List of working motherboards

[xCuri0]

Motherboards which don't support at least 2GB BAR size are considered not working.

If you're having any issues please see Common issues (and fixes) before replying.

Use this format in your comment:

• Motherboard: (motherboard model)
• GPU: (gpu model, include vram if it comes with multiple vram sizes)
• UEFIPatch: (yes or no depending on if you needed it)
• DSDT Patch: (yes or no depending on if you needed it)
• BAR Size: (BAR size that GPU-Z (Windows) or lspci (Linux) shows)
• RAM: (the amount of ram in your pc)
• Resume from sleep: (works or doesn't. if sleep doesnt work even without rebar then leave blank)
• Notes: any additional information and screenshots of GPU-Z Resizable BAR and GPU control panel showing rebar working optionally with CPU-Z and/or Device Manager Large Memory showing too.

User	Motherboard	GPU	BAR size tested	UEFIPatch req (Y/N)	Notes
@xCuri0	Gigabyte B75M-D3H	RX 580 8GB	8GB	Y	Requires DSDT modification
@romulus2k4	ASUS P8Z77-V PRO	RX 570 4GB	2GB	Y	4GB BAR works too just not in Windows due to AMD driver bug with 4GB Polaris
prazola (win-raid)	ASRock Z97 Extreme9	RX 6900 XT	16GB	Y	Requires DSDT modification to add QWordMemory
Miyconst	Huananzhi X99-QD4	RTX 3060	16GB	N
@sidex15	Jingsha X79M-S 1.0	RX 570 8GB	8GB	N
@dabm-git	Huananzhi X99-TF	Vega 64	8GB	N
@Tokobotenkai	ASUS Z97-Pro	Arc A770	16GB	Y
@cursemex	ASUS MAXIMUS VII HERO (Z97)	RX 6700 XT	16GB	Y	16GB BAR doesn't work with 32GB RAM
@val3nt33n	ASUS Z97i-Plus	Arc A750	8GB	Y
@Mak3rde	ASUS X99-A II	RX 6950 XT	16GB	Y
@LatiosAeon	ASUS Z170-WS	Arc A770	16GB	Y
@LatiosAeon	ASUS Z170 Sabertooth MARK 1	Arc A770	16GB	Y
@kodekq	ASUS Z170-A	RX 5700 XT	8GB	Y
@gyhmz	Gigabyte MZ32-AR0	Arc A380	8GB	N
@CiprianFlorin-Ifrim	Supermicro H11DSi-NT	RTX 4090	32GB	N
MD2 (win-raid)	Gigabyte B75M-D3H	RX 580 8GB	8GB	Y	Requires DSDT modification. Works with 2500k which is PCIe Gen2
@kkkyloo	Machinist X99-MR9A PRO V2	RX 6600	8GB	N
@SEt-t	ASUS Z170-P D3	RTX 3090	32GB	Y
@allesrebel	ASUS X99-DELUXE II	Arc A770	16GB	Y
@Intelevande	MSI Z97 Gaming 5	RTX 3060 Ti	8GB	N
@DanisMiryasov	ASUS STRIX X99 GAMING	RTX 3050	8GB	Y
@terminatorul	Gigabyte X470 AORUS GAMING 5 WiFi	Arc A770	16GB	N	BIOS officially supports ReBar on Zen 3 but not Zen 2 which needs this module
@Divin1ty666	ASUS Z97-DELUXE	RX 6700 XT	16GB	Y
@Phil-Libra	ASUS Z170-DELUXE	Arc A380	8GB	Y
@markmark2009	ASUS X99-DELUXE	RTX 3080 Ti	16GB	Y
@dsanke	ASUS Z170-DELUXE	RTX 3080	16GB	Y
@knasiotis	ASUS X99-DELUXE	RTX 3060 Ti	16GB	Y
@RafaelDiasCampos	ASRock X99 Extreme4	RTX 3070 Ti	8GB	N
@triple-octopus	MSI Z270 GAMING M5	RTX 3080 Ti	16GB	Y
Adiel235 (win-raid)	Gigabyte B365M Aorus Elite	RTX 3060 Ti	8GB	N	Have to connect iGPU to HDMI or won't boot
68k-dude (win-raid)	ASUS MAXIMUS VIII GENE (Z170)	Arc A770	16GB	Y
@dsanke	ASUS Z170-A	RX 5600 XT	8GB	Y	Sleep doesn't work because of 5600 XT override. Works with other GPUs
@originalm19	ASUS P8H61-M LX2 R2.0	RX 6600M	8GB	Y
@Koekieezz	Gigabyte H77-DS3H	RX 590 GME	8GB	Y	Requires DSDT modification. RTX 3060 Ti also works
@dsanke	MSI B150M PRO-VDH	RTX 3080	16GB	N
@necr0n	ASUS Z170-P	RTX 3090	32GB	Y
@dsanke	ASUS H110M-K	RTX 3080	16GB	Y
@JonasGMorsch	Huananzhi X99-F8	RTX 3060 Ti	16GB	N	RX 580 2048SP also works
@terryjx	ASUS X99M-WS	RTX A6000	64GB	Y
@aschor	ASRock X99 Taichi	RTX 3090	32GB	Y	Have to disable Above 4G Decoding Patch in setup
@GhoSt-1992	Asus Maximus VIII Hero (Z170)	RX 480	8GB	Y
@Nutst3r	ASUS X99-A	RX 6600	8GB	Y
@VictorS333	Huananzhi X79 "Green"	RX 580	8GB	N
@FusionDragon	Gigabyte Aorus B550M Pro-P (rev 1.0)	RX 5600 XT	8GB	N	Efiflash only works on BIOS F13 and lower
@robert789011	MSI Z97 Gaming 3	RX 6800	16GB	N
@SiliconExarch	ASUS X99-S	RTX 3070	8GB	Y
@therealRandomGenericDude	Supermicro X9DRI-LN4F	Arc A380	8GB	N	Had to use MMTool to insert the module
@Feyd1364	Asus Maximus VIII Hero (Z170)	RTX 4070 Ti	16GB	Y
@dsanke	MSI C236M WORKSTATION	Xe DG1	4GB	N	Rebar On is required to boot with this GPU
@kpwsyang	ASUS H170M-PLUS	RX 480	8GB	Y
@brafLake	ASUS EX-B150M-V3	RX 6600M	8GB	Y
@LordAdo96	Gigabyte B450 Aorus M	RX 580	8GB	N	Officially supports rebar only with Zen3 CPU
@Aushyro	ASUS Z170-E	RX 590	8GB	Y
@limyz	ASRock H77 Pro4-M	RTX 3080	16GB	Y	Requires DSDT modification
@Rubio85	Gigabyte AX370M-DS3H	RX 6700 XT	16GB	N	Have to use Flashrom DOS to flash
@Briggzy125	MSI Z170-A PRO	RX 6650 XT	8GB	Y	Had to use MMTool
@newborn2010	ASRockRack WC621D8A-2T	RTX A4000	32GB	N
@rekh127	ASUS Maximus IX Hero (Z270)	RX 5700 XT	8GB	Y	Arc A750 also works
@pnrxtx	ASRock Z170 Extreme4	RX 6800 XT	16GB
@sears-s	ASUS Z170-AR	Arc A380	8GB	Y
@MissBendy	MSI B150M Bazooka Plus	RX 6600 XT	8GB	Y
@matrixchanger	Asus Maximus V Gene (Z77)	RX 580	8GB	Y
@dormancygrace	ASUS Z270-A	RX 570	2GB	Y
@BatoMat	Gigabyte B450 AORUS ELITE	RX 590	8GB	N
mhi (win-raid)	ASRock Z97 Anniversary	RX Vega	8GB	Y	Requires DSDT modification to add QWordMemory
Bilbo571 (win-raid)	ASRock Fatal1ty Z97 Killer	Arc A750	8GB	Y	Requires DSDT modification to add QWordMemory
@Vlad00n	ASRock Z170 Extreme 4	RX 580	8GB	N
@Schlappenschleuder	ASUS SABERTOOTH Z97 MARK S	RX 5700 XT	8GB	Y
@denisdemaisbr	Machinist X99 MR9A Pro	RX 5500 XT	8GB	N
jo1902 (win-raid)	MSI H97M-G43	RX 6700 XT	16GB	N
@Kurtisdede	ASUS Z97-K	RX 6700	16GB	Y
@Gabus1983	MSI Z270-A PRO	RTX 3080	16GB	Y
@MissBendy	ASRock Z270M Extreme4	RX 6600 XT	8GB	Y
@CoderArceus	Gigabyte A320M-S2H	RX Vega 11 (iGPU)	1GB	N
Windius (win-raid)	Dell Precision Tower 7810	Arc A770	16GB	N
@Sir-Stroman	Asus Z170-A	Arc A750	8GB	Y
Scruffy (win-raid)	Dell R730	Arc A770	16GB	N
@rys995	Gigabyte B450M Gaming	RX 6700 XT	16GB	N	Downgrade BIOS to F52 (AGESA 1.0.0.6) to be able to flash modded latest BIOS (F64a used here)
@NedDarb	MSI Z170A Gaming M5	Arc A770	16GB	Y
@kaelso	Jingsha X99 D8	Arc A770	16GB	N
@zangliu2077	Gigabyte Z170-HD3	RX 5700 XT	8GB	Y	Need to downgrade my BIOS to F22C first (using Qflash) , then update the BIOS using modded BIOS with ReBAR inside (in this case I'm using modded F22C ). but “Invalid BIOS image” appears when flashing，Use the Efiflash_v0.87_DOS_Mod tool, get into FreeDOS, in the command prompt type in “efiflash NAMEOFBIOS.rom”，then it worked
@katapaltes	Gigabyte Z68MA-D2H-B3	RX 470 8GB	8GB	Y	Requires DSDT modification. Using U1C beta UEFI
@cdecaro3	Gigabyte GA-Z270P-D3	Arc A770 8GB	8GB	Y	Needed to use modified Efiflash running from FreeDOS to flash modified BIOS due to Qflash "Invalid bios image" error.
@janiss561	ASUS Z97-P	RX 6600	8GB	Y
@RRM5	Gigabyte AB350 Gaming	RX 6600	N
@u238	ASUS Z170-A	Arc A750	8GB	Y
@ravetank	ASUS ROG RAMPAGE V EDITION 10	RTX 3090	32GB	Y
@Fenivan	ASUS PRIME A320M-K	RX 6600	8GB	N
@driehoek91	ASRock H77 Pro4/MVP	RX 6800	16GB	Y	Requires DSDT modification. RX 580 8GB also works and OpenCore boots too
@400Ferrets	Dell Precision T3610	RTX 3060	8GB	N
@crashpb	ASUS Maximus VIII Hero Alpha	RX 6900 XT	16GB	Y	Resume from sleep doesn't work
@crashpb	ASUS Maximus VIII Impact	RTX 3070	8GB	Y	Resume from sleep doesn't work
@Nimayer	ASUS B150M-C	Arc A750	8GB	Y	Resume from sleep doesn't work. Flashed using flashrom
@X3Shadowknight	ASUS Z170I Pro Gaming	RTX 3060 Ti	8GB	Y	Flashed using AFUDOS
@anmolw	ASUS Strix Z270F Gaming	RTX 3070	8GB	Y	Flashed using AFUDOS backed up BIOS
Imperialz91 (win-raid)	ASUS Z97-P	RTX 3060 Ti	8GB	Y
SS_Seppuku (win-raid)	Gigabyte GAZ170X-Gaming 3	RX 6800 XT	16GB	Y	No display output from GPU until Windows boots
@drdanielwade	Gigabyte AORUS Z270X-Gaming 5	RTX 3060	16GB	Y	Resume from sleep works. Had to use modded Efiflash to flash the modified bios after booting into FreeDOS, Q-Flash gives Invalid BIOS error.
@RaduMemetea	HUANANZHI X99-F8D	RTX 3080	16GB	N
@KKallor	ASUS Z170-A	RTX 3080	16GB	Y	Had to use MMTool
@R1K1RU	ASUS X99 DELUXE II	RTX 3090	24GB	Y
@WillyTP	ASUS Z270A-Prime	RTX 3060 Ti	8GB	Y
@aquamacho1	Jginyue x99 Titanium D3	RX 6700 XT	16GB	N
@yudomsft	ASRock X99E-ITX/ac	RTX 4070	16GB	N	Resume from sleep works
@GloomySandwich	Asus Z97-A	RX 6800 XT	8GB	Y	16GB BAR doesn't work because of 32GB RAM. 6 beeps although system works
@ADTP	Gigabyte A320M-H	RX 6600	8GB	N	Resume from sleep works. Mobo supports Rebar for Zen 2 and Zen 3, used this to get it working on Zen+. Have to downgrade to BIOS version F52 (AGESA 1.0.0.6) for modded BIOS to install.
@Lock-The-Door	ASUS PRIME Z270-A	Arc A750	8GB	Y	Resume from sleep works. used /GAN to bypass verification
@Drakiel26	ASUS PRIME Z270-A	RX 580 4GB	2GB	Y	used /GAN to bypass verification
@ripkaby	ASUS Maximus VIII Extreme (Z170)	RTX 3080	16GB	Y	Resume from sleep works
@stetommy	MSI B250 Krait Gaming	Arc A770	16GB	Y
@Biogent	ASUS P8Z77 WS	RX 6700 XT	16GB	Y	Resume from sleep works. Strange fake (or no 🤔) "CSM disabled - No" but without ReBAR it turns to "Yes" without any changes in BIOS/EFI. There are warning beeps (1 long and 3 short) at startup and black screen due to Windows login screen (possibly to start GPU driver). But no any other errors or issues at all, ReBAR works perfectly.
@gwent98	MSI X99A MPOWER	RX Vega 56	8GB	N
@durdin85	MSI Z97A Gaming	Arc A770	8GB	Y	Sleep untested
@thierbig	MSI Z270 XPower Gaming Titanium	RTX 4070	16GB	N
@Dadovvv	Gigabyte GA-H110-D3A	RX 580 8GB	8GB	N	Everything works great except No bios display but Windows works
@pabloalber84	Dell Optiplex 7010 Q77	RX 580 8GB	8GB	Y	Requires DSDT modification. Resume from sleep works. See #11 (comment)
@264-bit	ASRock Z97 Extreme3	RX 5700 XT	8GB	Y	Requires DSDT modification
@TodaLovErika	ASUS X99 E10G WS	RTX 4070	16GB	Y	Resume from sleep works. Arc A770 works too
@Affrounia	MSI Z97 PC MATE	RX 6700 XT	16GB	Y	Resume from sleep works
@Ckosmick	Gigabyte G1.Sniper Z170	RX 6700 XT	16GB	Y	Resume from sleep results in blank screen
@ochalam	MSI B450M PRO-VDH MAX	RX 580 4GB	2GB	N	Resume from sleep works
@aolszowka	ASRock Z77 Extreme4	Arc A380	8GB	Y	Requires DSDT modification. Resume from sleep works
@awesomekyle	Tyan S8030	Arc A380	8GB	N	Flashing required me to steps in the Annex of this page: https://winraid.level1techs.com/t/guide-how-to-flash-a-modded-ami-uefi-bios/30627. Video Option ROM needs to be set to Legacy to boot FlashROM
@Ph0rk0z	Supermicro X10DRG-OT+-CPU Broadwell	RTX 3090	32GB	N	Flash right from remote agent webui
@LatiosAeon	ASUS Prime Q270M-C	RTX 3090	32GB	Y
@lucash1978	Huananzhi X99-BD4	RTX 3060 Ti	8GB	N	Resume from sleep works
@Cartu-Nalgues	Gigabyte B450M H REV1.X	Arc A750	8GB	N
@DanielWhitt28	Asus Maximus IX Formula	RX 5700 XT 50th Anniversary	8GB	Y	Resume from sleep works
@E-DJ	Gigabyte Z77MX-D3H-TH	RX 6800	16GB	Y	Resume from sleep works. Requires DSDT modification
@EwanLight	MSI X99A Raider	RX 6700 XT	16GB	Y
@LaiSamy	MSI C236A WORKSTATION	RTX 3070	8GB	N	Resume from sleep works. Must enable 4G Decoding and disable CSM on first boot, or your'll get a vga debug and not boot.
@666cloudyy	QIYIDA HM70 LGA 1356	RX 470	4GB	N	Resume from sleep works, use 2GB BAR on Windows due to AMD driver bug
@Swiftb0y	MSI Z170 KRAIT GAMING	RX 6900 XT	16GB	Y	Resume from sleep works
@Acrivec	GA-Z170X-Gaming 7	RX 7900 XTX	32GB	Y	Resume from sleep works. Third attempt, my BIOS rolled back to factory F4 - and with that I've used efiflash_mod 0.65 on USB, using MS-DOS from rufus. Can't access bios. My guess is that this ReBAR is also 'enabled' on the integrated GPU (and it does not support it). Can't turn on secure boot.
@Fazzoc	Gigabyte B550I AORUS PRO AX	RX 5600 XT	8GB	N	Downgrade BIOS to be able to flash modified version
@NitrousZX	ASRock H61M-HG4	RX 580 4GB	2GB	Y	Requires DSDT modification
@Koekieezz	ASRock H97M Pro4	RX 580 8GB	8GB	Y	Resume from sleep works. Requires DSDT modification to add QWordMemory
@kagerou8124	TYAN S7109GM2NR-2T	RTX 3090	32GB	N
@sawok-git	Gigabyte Z170-HD3 DDR3-CF	RX Vega 64	16GB	Y
@kirusyaga	Gigabyte X299-WU8	Arc A750	8GB	Y	Use Q-Flash
@kgje	Supermicro X11DPI-NT	Arc A750	8GB	N	Modified BIOS updated using the BMC without issue
@RexSonic	MSI Z270 SLI PLUS	RTX 3070	8GB	Y	Resume from sleep works
@d4RkArchon	ASUS H170-PRO-GAMING	RTX 3070	8GB	Y	ASUS EZ Flash was blocking flashing of modified bios. Had to convert to rom file and flash with AMI flash tool.
@Baks456	ASUS P8Z77-V	RX 6600	8GB	Y	Resume from sleep works. Missing cursor in bios with enable rebar. When switching the BIOS on a video card (dual BIOS), you need to reset CMOS to work.
@Insane88	Gigabyte B365M DS3H	RTX 3060 Ti	8GB	Y
@Koekieezz	Gigabyte B75M-D3H	RX Vega 56	8GB	Y	Requires DSDT modification
@colepcsx2	ASUS X99-A	RTX 3090	32GB	Y	Resume from sleep works. After I extracted the CAP body and flashed it with the AMI Aptio IV BIOS tool, it worked all at once.
@98sec	GIGABYTE B450M DS3H	RX 5700 XT	8GB	N	Resume from sleep works. Downgrade BIOS to F52 (AGESA 1.0.0.6) to be able to flash modded latest BIOS (F64 used here)
@shrshnka	ASRock Z170 Pro4S	RTX 3070	8GB	Y	Resume from sleep works
@vinaoc	ASUS PRIME Z270-A	RX 580	8GB	Y	Resume from sleep works
@CNduan	Gigabyte Z97-HD3 2.1	RX 5700 XT	8GB	Y	Resume from sleep works
@andlbrei	ASUS SABERTOOTH Z170 S	Arc A770	16GB	Y	Sleep works after updating Intel ME. I could not get ASUS BIOS Flashback to work (selected file is not a proper BIOS), so I used AFUDOS to flash, worked great.
@ShockTime	ASUS Z170i Pro Gaming	RX 6700 XT	16GB	Y
@tiburcillo	Asus EX-B250M-V3	Pro W6600	8GB	Y	Resume from sleep works. Arc A770 8GB VRAM also works
@Flyw4vy	Optiplex 7010 MT	RX 5600	8GB	Y
@DarkRiDDeR	Huananzhi X79-ZD3RE V2	RX 590	8GB	N
@flamingleg	MSI Z170A PC MATE	RX 6600 XT	8GB	Y
@dbaggett262	MACHINIST X99-MR9D PLUS v2.0	RTX 3070	8GB	N	Used regular MACHINIST X99-MR9D shortcuts/info in Mi899 to run AMIFlash to extract stock BIOS and flash modded BIOS, since X99-MR9D PLUS (v2.0 or otherwise) is not in Mi899 database.
@Jun-TheTechShinobi	Dell OptiPlex 3010	Tesla M40	32GB	N	Below is the firmware section of my worklog, check the full blog post for hardware mod, server installing, and budget strategy for cheapskate.
@Baks456	Atermiter X99	RX 6700	16GB	N
@fyr233	TYAN S8030GM2NE	Moore Threads MTT S80	16 GB	N	This GPU requires resizeBAR. If not, the driver can't be installed. If the resizeBAR is 8GB, there will be many bugs. 16GB will be fine.
@ThanatosUA	Huanan X79 Gaming Deluxe	RTX 4070	16GB	N
@puuska	ThinkStation P500	RX 580 2048SP	8GB	N	Resume from sleep not working, black screen after resume. Flashing BIOS requires external programmer as the flash descriptor is locked and you cant flash anything except stock bios via lenovo's tool
@terminatorul	Gigabyte X399 AORUS Gaming 7 WiFi	RX 5700 XT	8GB	N	must be flashed from within UEFI setup, using QFlash option
@Rasmus715	MSI B150 Gaming M3	RX 6800 XT	16GB	Y	Resume from sleep works. Using in pair with Intel QTJ1 ES. Attaching BIOS with Re-BAR support and microcodes for Coffee Lake / ES here
@Karalux	ASRock IMB-180	RX 590	8GB	Y	Custom bios from AsRock to add above 4G decoding, IMB1801.70Rebar.zip
@FPSUsername	ASUS ROG Maximus VII Ranger	RX 6600	8GB	Y	Need to extract PCIeBus, PCIeHostBridge and NvramSmi from the UEFIPatch patched bios and replace the modules in an unpatched bios using MMTool 4.5. BdwUSB3.txt patch must also be included to fix keyboard issue. MAXIMUS-VII-RANGER-ASUS-3503-REBAR.zip
@fabriguzden	Gigabyte Z77X-UD5H	RTX 3060	16GB	Y	Requires DSDT modification. Z77XUD5H+ReBar+NVMe+4G Decode All Options Show.zip
@SignalSpectre	ASUS Rampage IV Formula	Arc A770	16GB	N	Resume from sleep works. X79 only needs DSDT patching if Linux. Don't use an ARC GPU with a 4 core ivy bridge cause no rebar can save you from the bad Intel driver optimization (in Overwatch I lost around 80 fps going from the RX570 to the ARC, in Apex the loss was about 60 fps, all of this with rebar enabled).
@jansebastiangr	ASUS ROG STRIX Z270G	Arc A770	8GB	Y	BIOS Flash ONLY works via AFUDOS (Rufus) USB Drive
@b800047	GIGABYTE B450M DS3H WIFI	Arc A770	16GB	N	Downgrade BIOS to F51 (AGESA 1.0.0.6) to be able to flash modded latest BIOS (F66b used here). shoutout to this video for giving me in idea on how i should install mine youtube.com/watch?v=waIjkovptXA
@jwagnervaz	Atermiter ZX-DU99D4	RX 5700 XT	8GB	N
@mrm1key	Asus Z170 PRO Gaming	Arc A770	16GB	Y
@YaZie96	ASRock Z97 Extreme 9	RTX 4070 Ti	16GB	Y	Resume from sleep works
@Hiuzuki	MUCAI P4-X99	RX 5500 XT	8GB	N	Make sure the options "BIOS Lock" and "Host-Flash Lock Down" ara disabled in BIOS. They are located in "Intel RCSetup Menu / PCH Configuration". Thanks to the Youtube user "@gabrielzika27"
@Thalhammer	Supermicro X10DRi-T	Arc A380	8GB	N
@Listenwzt	ASUS H97 PRO GAMER	RTX 4060 Ti	8GB	Y
@WarhammerTH	Gigabyte B360M D3P	MTT S80 16GB	16GB	Y	Using F14 BIOS
@77loop	ASRock X79 Extreme 9	RTX 3060	16GB	Y	Resume from sleep works
@xtomasnemec	ASUS TUF Z270 Mark 2	Arc A750	16GB	Y
@rootBrz	ASUS H110M-C	RX 580 8GB	8GB	Y	Used 4212 ver. of bios. Flashed .rom file through this guide, after patching .rom with UEFI Patch you need to extract body of the rom through UEFI Tool as shown in video. The size should be equal to 16384 KB, not 16386 KB. Also attached my modified bios in case someone needs it. bios.zip
@Le-choo	MSI B150i GAMING PRO	RX 6700	16GB	N
@NickjacksonD	ASUS H110M-C	Arc A750	8GB	Y	Followed the main guide, my bios file was 16777kb, installed anyway to test (same asus h110m-c board) and had black screen with gpu attached issues. Simply downloaded rootBRz 's file and installed it, and it worked!
@NitrousX	MSI X99A XPOWER GAMING TITANIUM	RTX 3080	16GB	Y	Flash using M-Flash over USB BIOS revision E7A21IMS.150
@itsmaxx1	Gigabyte A320-S2H (rev 3.0)	RX 6700 XT	16GB Y	Resume from sleep works. Need to downgrade BIOS to F2 to flash
@d0x360	Gigabyte X99A UD4 (WiFi) (rev 1.00)	RTX 3080 Ti	16GB	Y
@generaleramon	Biostar X370GTN	RX 5700 XT	8GB	N
@dima102russ	ASUS Z170 Pro Gaming	RX 5700 XT	8GB	Y	Resume from sleep doesn't work
@creble	Gigabyte B365M H	RTX 3060 Ti	8GB	8GB	Y
@Dantrigger	ASUS Maximus IX Code	RTX 4090	32GB	Y
@shikulja	Asus Maximus IX Formula	RX 580 8GB	8GB	Y	Used Bios unlock (uefi) + FPT. The bios unlock + flashrom(dos internal) method also worked. After flashing Nvme+sata hard drives are not detected. Hard reset safe_boot+clear_cmos MB buttons helps.
@SlAvEnChIk	Asus Maximus VIII Ranger	RTX 4070	16GB	Y	Need to enable iGPU in BIOS
@Eugene-Dubovski	ASRock Z77 Pro4-M	Arc A750 8GB	8GB	Y	Requires DSDT modification. Resume from sleep works
@tiejam	ASUS Maximus VII FORMULA	RTX 4080	16GB	Y
@predprey2	ASUS Sabertooth Z77	RTX 4070 Ti	16GB	Y
@Pereira2004	Gigabyte AB350 gaming 3	RX 6700 XT	16GB	N	Had to downgrade BIOS to F31 to be abble to use Q-Flash and flash last one (F52n) with rebar mod inserted
@Supersiegger16	Gigabyte AX370 Gaming 3	RX 590	8GB	N	Flashing modified BIOS with FlashDOS 1.2 worked perfectly (while already having the newest BIOS (F51m) !) -> no need to downgrade due to security restriction of AGESA :)
@gj13	Gigabyte B450 Aorus Pro Wifi (rev 1.x)	RX 6700 XT	16GB	N	Resume from sleep works. didn't pass Q-Flash integrity check, so I flashed with Flashrom from winraid.level1techs.com/t/tool-flashrom-v1-2-dos/36544
@turkey758	ASUS P8Z77-M	Arc A770	16GB	Y	Resume from sleep works
@PeanutAria	GIGABYTE X470 AORUS GAMING 7 WIFI	RX 580 8GB 8GB		N	Latest bios (F63i) flashed using flashrom 1.2 without removing any extra modules
@linuskim07	MSI Z170A-S02	Arc A750	16GB	Y	Resume from sleep works. Motherboard already has Above 4G decoding features, just enabled and disabled CSM by enabling Win8.1/10 WHQL Support enabled.
@nuclearmistake	ASUS Prime X299-A	RTX 3090	32GB	Y	I had to flash by removing the CAP header (making it a ROM) with uefitool as outlined on winraid.level1techs.com/t/guide-how-to-flash-a-modded-ami-uefi-bios/30627 and then use afuwinx64.xe whatever.rom /GAN to flash. However, my flashback button does not light up when pressed, so I couldn't get flashback to flash the CAP.
@Mullin	ASUS Z97 Pro Gaming	RTX 3060 Ti	8GB	Y
@SebVig	ASUS Rampage V Extreme	RTX 3090	32GB	Y	Need to use MMTool method to avoid BIOS corruption #98
@ebkess2	MSI B250M MORTAR ARCTIC	Arc A770	16GB	Y	Had to change "Integrated Graphics Devices Configuration -> Initiate Graphics Adapter" to IGD because at least this MSI board wont automatically fall back to the iGPU if the UEFI fails to find the dGPU. Had to go into Device Manager in Windows and disable the iGPU or games that have XeSS (doesn't have to be enabled) will crash with varying errors in Event Viewer.
@cacafuti8888	ASUS MAXIMUS VIII RANGER	RX 580 8GB	8GB	Y	Resume from sleep works
@JamSWACD	ASUS X99E-WS	Radeon VII	16GB	Y
@Altair2009	ASUS Z170A	RX 6700 XT	16GB	Y	flash using afudos 3.0.4, pad issue with uefi patch have to use mmtool 5 (mmtool 4.5 cant save rom error)
@abarreraj	ASUS Gryphon Z97 TUF	Arc A580 8GB	8GB	Y	Resume from sleep works
@Ahriman0	ASUS Strix Z270F Gaming	RTX 3080 Ti	16GB	Y	Flashed using AFUDos
@iknightpl	ASUS B150M-PLUS	RX 580 2048SP	8GB	Y	1,there is no logo on system boot. 2, when set bar size is too small, It will cause system halt.
@notsyncing	Supermicro C9X299-RPGF-L	Arc A770	16GB	Y	Resume from sleep works. Though this motherboard has Above 4G Decoding and Re-sizable BAR options in BIOS, but the BAR size is only 256MB even after these options enabled. So this patch is needed.
@Balrogos	Asus PRIME B250M-K	RX 570 8GB	8GB	Y
@tumo07	BIOSTAR H310MD PRO (ver 6.x)	RX 6700 XT	16GB	Y
@Ross0907	ASUS A320m-K	RX 550	1GB	N
@zhiwoo	Dell Precision T5810	Arc A750 8GB	8GB	N	External EEPROM flasher required. Dell BIOS flasher would not allow the flashing of modified BIOS.

[sidex15]

Chinese Unbranded X79 motherboard, RX 570 8GB...

[dberrocal-git]

Huananzhi X99-TF
Vega 64

Registry editing is required to allow drivers to enable the ReBar.

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0000]

"KMD_EnableRebarForLegacyASIC"=dword:00000001
"KMD_RebarControlMode"=dword:00000001
"KMD_RebarControlSupport"=dword:00000001

[Tokobotenkai]

Would my Z97-Pro be considered working? I haven't tried the 16GB patch (only tested to 8GB), but it needs the replacement of the older 1204 NvramSmi module and the PciBus UEFIPatch to work. The GPU tested is the Intel Arc A380 (will test the A770 once I get a replacement power supply).

[xCuri0]

@Tokobotenkai anything 4GB or higher is considered working but if you find a larger size doesn't I can add a note

[EDK-Rise]

Hi, i have z270 m7 with 7700k. my motherboard has 4G decoding in bios. i also have gtx 1080. how to patch my bios?
here my bios link:
https://download.msi.com/bos_exe/mb/7A57v10.zip

[xCuri0]

@EDK-Rise GTX 1080 doesn't support resizable bar

[aquamacho1]

Chinese Unbranded X79 motherboard, RX 570 8GB...

@sidex15 But can you actually check what a name of this board?, im trying figure out how to patch mine X79, checking whats the difference between them, maybe i will find something. Or even better, save a bios file, and upload here.

[sidex15]

@aquamacho1
well after deep diving in the russian overclocking forums I found that my board is Jingsha X79M-S 1.0 the Picture is the same as mine...

I just followed the X99 guide from Miyconst and use Enabling hidden 4G decoding...

[aquamacho1]

@sidex15 This is awesome, thx. I will just buy this mobo then :), im just kidding.

[sidex15]

Chinese Unbranded X79 motherboard, RX 570 8GB...

Add to note that macOS(Hackintosh) didn't boot after enabling Rebar..

[xCuri0]

@sidex15 I think macOS doesn't support large BARs not a problem with the bios or anything

[sidex15]

@sidex15 I think macOS doesn't support large BARs not a problem with the bios or anything

Yeah i'm using opencore 0.8.3 even with resizeapplegpubars set to 0 won't even boot to macOS...
I guess it's still using the max BARs...
I'll try lowering the BAR size see if it boots...

[sidex15]

@sidex15 I think macOS doesn't support large BARs not a problem with the bios or anything

@xCuri0 yep you're right setting a rebar size of 256mb boots to macOS... I also found out that my motherboard is Jingsha X79M-S 1.0 after digging in the Russian overclocking forum...

[LatiosAeon]

ASUS Z170-WS & Intel ARC A770, BAR size set to unlimited and the full 16GB worked

Also works on a ASUS Z170 Sabertooth MK1

[kodekq]

A big thank you @xCuri0 and @Mak3rde
Asus z170-a, 5700xt and use patch "Don't downgrade 64-bit BARs to 32-bit (by @Mak3rde)"

[gyhmz]

MZ32-AR0 (rev. 1.0) +ARC A380 +TESLA M40
Before:

(A380 has a 43 code after installing any driver later than 31.0.101.3277 on my platform. I don't know why Tesla M40 has "large memory range" by default. Does that mean there is a white list inside the bios for some rebar cards? )

After inserting ReBarDxe.ffs and running ReBarState.exe BAR size set to unlimited :

(A380 works with the latest driver after doing these. A small issue i found is that Intel® Arc™ Control refuse to start. )

[xCuri0]

@gyhmz Tesla M40 doesn't have ReBar it just has a large BAR by default.

[CiprianFlorin-Ifrim]

I can confirm it works on a Supermicro H11DSi-NT (tested with bios v1.3, should work with the v2.4 as well). Tested with a 4090 FE. No patches needed, 256GB ram installed.
GPU-Z says 3 bars are available - 16MB, 32MB, and 32GB. (before it was 16,32,256MB, and it said "disabled in bios")

Thanks a lot for making this tool.

[Divin1ty666]

@Tokobotenkai Hey! Do you mind sharing modified bios for z97-pro, please?

[Tokobotenkai]

@Tokobotenkai Hey! Do you mind sharing modified bios for z97-pro, please?

There you go: https://drive.google.com/file/d/1yZb9LkaTvvBjAkJfGSO-hPgm2L_W9SWH/view?usp=sharing

I have random issues where my keyboard and mouse is not detected on boot, not sure if it is a dying USB or a BIOS issue though.

[cursemex]

@Tokobotenkai Hey! Do you mind sharing modified bios for z97-pro, please?

There you go: https://drive.google.com/file/d/1yZb9LkaTvvBjAkJfGSO-hPgm2L_W9SWH/view?usp=sharing

I have random issues where my keyboard and mouse is not detected on boot, not sure if it is a dying USB or a BIOS issue though.

@Tokobotenkai I have them on my Hero too. Funny enough they only occur after setting rebar state value.

[Tokobotenkai]

@Tokobotenkai Hey! Do you mind sharing modified bios for z97-pro, please?

There you go: https://drive.google.com/file/d/1yZb9LkaTvvBjAkJfGSO-hPgm2L_W9SWH/view?usp=sharing
I have random issues where my keyboard and mouse is not detected on boot, not sure if it is a dying USB or a BIOS issue though.

@Tokobotenkai I have them on my Hero too. Funny enough they only occur after setting rebar state value.

I suspect it is some device being mapped in the same error, but the error is intermittent. I workaround it by using a PS2 keyboard.

[Divin1ty666]

@Tokobotenkai Thank you! If I'm going flash bios with programmer CH341A so I'll need to uncapsule bios into ROM format, right?

[kkkyloo]

machinist mr9a pro v2 work with re bar

[xCuri0]

@supermanz87 you have to use UEFIPatch. it's described in the README how to use it

[SEt-t]

Asus Z170-P D3 : requires patch "Don't downgrade 64-bit BARs to 32-bit (by @Mak3rde)"

[cursemex]

@xCuri0 I found this:
LongSoft/UEFITool#116 (comment)

842A454A-75E5-408B-8B1C-36420E4E3F21 10 P:9801000072:0000000072

Vit9696's code allows for nvramsmi to write on UEFI for Z97's Asus motherboards like my Maximus VII hero. Already tested it, and it works.

Saved me from extracting nvramsmi from 1104 and replacing it on 3503.

[localhosts-A]

Motherboard: Gigabyte GA-Z87M-D3H
GPU: GTX 1660 6GB
UEFIPatch: yes
DSDT Patch: yes
BAR Size: 8GB
RAM: 16GB
Resume from sleep: dont know

This is the modified bios
Z87MD3H.zip

[FedirVolkov]

Motherboard: OE_H310CD4 Ver 1.21 (B250)
GPU: MAXSUN RX 560D Terminator 4 GB
UEFIPatch: Yes (but not required in my case)
DSDT Patch: No
BAR Size: 2GB
RAM: 16GB
Resume from sleep: -

At first I thought it didn't work because there is no "Large Memory" line in Device Manager. Only later I found in this topic that GPU with BAR size less than 4GB does not show up in Large Memory section. You should add that info somewhere in wiki (I think).

[TakunaiMaro]

Motherboard: Aorus B365m Elite
GPU: ARC A750 8GB TITAN OC
UEFIPatch: No
DSDT Patch: No
BAR Size: 8 GB
RAM: 16GB


it won't boot if you don't change the video output priority in the bios, it still dont allowed me to use the GPU on the PCe 1 port, drop an error in device manager, error 12. Therefore you will have to use the other PCe.

[Minniminiemo]

Any way to get into contact with rekh127 that got the REbar working on the maximus code IX? I need some help and he has the same set up and im wondering how he got it working

[vlnka]

Motherboard: Supermicro H11DSi Rev 2.0
GPU: Intel Arc A310
UEFIPatch: no
DSDT Patch: no
BAR Size: 4 GB
RAM: 128 GB

Was not able to flash modified BIOS using the EFI shell script (flash.nsh) that uses the AMI Aptio Firmware Update utility - it fails some signature verification process and throws an error: Error 18 - Secure Flash Rom Verify fail.

The modified BIOS can be flashed via the IPMI/BMC web interface - there is a BIOS Update option.

[CiprianFlorin-Ifrim]

@vlnka you asked "it seems that the flash utility is checking signatures of the BIOS file and ultimately errors out (error 18).
Do you recall dealing with this, or was that not a thing on the older BIOS version you used?"

The latest version of IPMI 1.52 adds BIOS Signature Verification and you are only able to flash bios 2.8, unless you desolver the BIOS chip or use a SOIC clip with a CH341 programmer to flash back an older version of IPMI/BMC firmware.

So that's one reason for the error. But you then mentioned that through IPMI it worked, which is strange, because the signature verification is added to SMC, IPMI and EFI Shell.

Did you get it working with 2.8? Previously I only had luck with 1.3.

[vlnka]

@CiprianFlorin-Ifrim Yes, I deleted the question when I figured out the solution.

Correct, I am currently running modified 2.8 BIOS which I flashed over the stock 2.8 BIOS using the Maintenance > BIOS Update menu in the IPMI interface. BMC Firmware Version is 01.52.00. The IPMI web interface just let the modified BIOS through, no questions asked.

This is the modified BIOS image I made and used. Use at your own risk:
https://drive.google.com/file/d/1ZB5I5hKuASMmL_qGO_dpHvqMY48acYrz/view?usp=sharing

There are some minor caveats:

• If displays are connected to the GPU that is now Resizable BAR-enabled, there are graphical glitches in the BIOS. If the GPU is installed but you use the onboard VGA or a GPU with no ReBAR support, the BIOS looks normal
  

• I couldn't get ReBarState working on Linux after building with CMake. It appeared as though it worked but it had no effect. I had to install Windows and use ReBarState.exe to get it working. Then ReBAR works everywhere.
  
  

[JGSphaela]

@gittyaf 16GB Arc A770 will work if you put less than 32GB of RAM.

Also 5700 XT cannot use and does not need 16GB BAR, it has only 8GB VRAM if you put it in a modern motherboard it will also have 8GB BAR

Is there a reason why 64GB of RAM won't work with 16GB A770 or can it be fixed? I kind need 64GB in my use case and nonetheless having to put 32GB of RAM I just purchased to waste is a bummer too...

Edit: Just checked that 32GB is not working too. #4 (comment)

[AbbieDoobie]

Motherboard: Gigabyte B450 Aorus Pro Wifi (v1.0)
GPU: Nvidia RTX 4070
UEFIPatch: No
DSDT Patch: No
BAR Size: BAR0 16MB, BAR1 16GB, BAR2 32MB.
RAM: 32GB
Resume from sleep: Works.
Notes: Used Flashrom (1.2) due to being on a newer BIOS version that has SecureFlash enabled (F66a); flashed a modified F66d bios. Had to do this since Gigabyte doesn't support ReBar on Ryzen 2000.

edit: fixed BAR size.

[DADA30000]

Will this work with M5A97 R2.0?

[gittyaf]

@gittyaf 16GB Arc A770 will work if you put less than 32GB of RAM.
Also 5700 XT cannot use and does not need 16GB BAR, it has only 8GB VRAM if you put it in a modern motherboard it will also have 8GB BAR

Is there a reason why 64GB of RAM won't work with 16GB A770 or can it be fixed? I kind need 64GB in my use case and nonetheless having to put 32GB of RAM I just purchased to waste is a bummer too...

Edit: Just checked that 32GB is not working too. #4 (comment)

Might be a limitation with your motherboard chipset. On my Z97 PC Mate, the largest Bar size I could get was 8GB. Intel drivers refused to enable ReBar for my 16GB A770 while AMD allowed it to work by reducing the GPU's VRAM to 8GB and performance absolutely tanks if you exceed that 8GB.

[JGSphaela]

@gittyaf 16GB Arc A770 will work if you put less than 32GB of RAM.
Also 5700 XT cannot use and does not need 16GB BAR, it has only 8GB VRAM if you put it in a modern motherboard it will also have 8GB BAR

Is there a reason why 64GB of RAM won't work with 16GB A770 or can it be fixed? I kind need 64GB in my use case and nonetheless having to put 32GB of RAM I just purchased to waste is a bummer too...
Edit: Just checked that 32GB is not working too. #4 (comment)

Might be a limitation with your motherboard chipset. On my Z97 PC Mate, the largest Bar size I could get was 8GB. Intel drivers refused to enable ReBar for my 16GB A770 while AMD allowed it to work by reducing the GPU's VRAM to 8GB and performance absolutely tanks if you exceed that 8GB.

@gittyaf I did manage to get rebar working with AMD GPUs so my guess is Intel is just built different lmao. I didn't test with a AMD GPU with more than 8gb of VRAM tho, I will do it when I got some time to spare. Have you encountered the issue of 4gb+ ReBar? -> #4 I think fixing this will eventually fix the problem.

I'm running 1gb ReBar for A770 for now, and in Unity games it seems working just fine. The frametime is somewhat stable and performance is inline with a 3060 Moblie, which according to PassMark is slightly more powerful than A770. I've test some DX12 titles too. Just that it seems Intel driver gets mad for this and I've got tons of bugs(black screen when fullscreen but can see the game when pressing Windows key, etc).

[Xyz00777]

@vlnka are you able to do the same with the H11SSL bios? because im trying it at the moment for around 3 hours, with the 2.8 and 3 version and im getting for both the signature error. CiprianFlorin-Ifrim mentioned....
im tried it with UEFI shell, web and IPMItool flashing... all didnt worked... here is the original 2.8 bios version
BIOS_H11SSL_1A03_20231214_2.8_STDsp.zip

[CiprianFlorin-Ifrim]

@Xyz00777 you won't be able to fix it, I spent hours with UEFI Shell, IPMI, bios flashing, and other Supermicro remote solutions for the terminal. Easily over 10h doing research. As long as you have done any modifications like enabling AMD CBS or added rebar etc, they will not get flashed, which means the signature feature works well. I'm surprised @vlnka 's actually flashed easily.

Get an EEPROM programmer and a SOIC clip (or just desolder the chip) and program the IPMI/BMC software to the last version before 1.52 (which added signature verification). I spend 10h trying and research everything, desoldering the chip, reflashing and flashing it took me 1h. Just go for it if you really need rebar.

[Xyz00777]

i also had contact with the supermicro support (support@supermicro.com) a few days ago and they had let me know, that they are not considering at the moment because they had just added it to H12 series. BUT they also said, that when enough persons are requesting it than they may considering it in the future to built it in officially. so maybe if you two also request it they will built it in. especially if it is really "just" an ff file who needed to be added like with these instrcution here... then the H11 series would be officially be supported with rebar...

[vlnka]

@Xyz00777 I didn't really do any magic to the BIOS file, I just followed the steps outlined in the wiki.

I modified the H11SSL BIOS image you shared using the exact same method and got this (use at your own risk): https://drive.google.com/file/d/1yOX826igfM_f05zJWWPS2cSzBgsfVz-E/view?usp=sharing

I'm not sure why it worked for me and why it isn't working for you. I just opened the BMC web interface, opened the Maintenance > BIOS update section, uploaded the modified BIOS image and it didn't ask for anything, didn't throw any errors. I rebooted, ran ReBarState.exe, set it to 32 (unlimited), rebooted again and ReBAR was working

[CiprianFlorin-Ifrim]

@Xyz00777 considering these motherboards are from 2017 and developed even a few years prior to that, I highly doubt it would happen. Especially since now Supermicro is having some legal troubles around fake "bookkeeping". So yeah, pay 10$ for an eeprom flasher, move back to 1.48, stay on that and you'll be able to use any signed or non-signed bioses forever and call it a day.

[Xyz00777]

yeah its sadly not working.
And where can i get the older version, i dont know where i can download it because im only getting the newest version from the supermicro site :/

[CiprianFlorin-Ifrim]

@Xyz00777 a nice person decided to make a self-hosted website where they upload all the Supermicro bioses ever for all boards. Here, use the search bar with your supermicro board model "H11SSL". Check entry 15332, that should be the last one before firmware signature was added for your board.

[kylewanoverseas]

Motherboard: ASRock Z170_pro4s
Modbios&Processor Modification:QTJ2(i7-10750h ES)
GPU: AMD 6750GRE 10GB
UEFIPatch: yes
DSDT Patch: No
BAR Size: 8 GB
RAM: 16GB

[mikehell87]

Motherboard: ThinkCentre M710t (more correctly ”Lenovo 3102", but most will probably find it under the machines name) Its an LGA1151(v1) Mobo. GPU: Intel Arc 380 (Sparkle Elf) UEFIPatch: Yes. Only possible via external programmer. DSDT Patch: No BAR Size: 8192 MB RAM: 32GB Note: Added Support for Coffee Lake and Coffee Lake Refresh (8th and 9th gen). Resume from sleep: Seemingly worked, but i had a Bluescreen shortly after. Would need to watch it for longer to make sure if its a general issue or sleep-related. (I usually dont use the Sleep function) ThinkCentre M710t ReBar BIOS.zip

Hello Can Someone help me to activate rebar on my computer ? I really don't know how it works to modify the bios iso. The closer computer from mine is the one just over there M710s, i have a M910s (and the same graphic card a380). Thanks for your help @Tectrek

[Ian275]

Motherboard: Acer IPIMB-AR
GPU: Intel DG1
UEFIPatch: Yes
DSDT Patch: Yes
This motherboard with DG1 won't boot if without ReBAR support.

https://github.com/Ian275/IPIMB-AR_UEFI

After restarting, the motherboard sometimes gets stuck after the POST with no display output.

[Mhii0]

Do you mind sharing modified bios for z97-pro, please?

Hi, Do you mind sharing modified bios for Asus Z97-A, please? if you have time ill appreciate that

you can use one of those: original one or updated one in ROM format (choose the one will worked better)

https://winraid.level1techs.com/t/offer-asus-z97-a-updated-bios/32089/13
https://www.asus.com/ca-en/motherboards-components/motherboards/others/z97a/helpdesk_bios?model2Name=Z97A

[sneak2k]

Motherboard: ThinkCentre M710t (more correctly ”Lenovo 3102", but most will probably find it under the machines name) Its an LGA1151(v1) Mobo. GPU: Intel Arc 380 (Sparkle Elf) UEFIPatch: Yes. Only possible via external programmer. DSDT Patch: No BAR Size: 8192 MB RAM: 32GB Note: Added Support for Coffee Lake and Coffee Lake Refresh (8th and 9th gen). Resume from sleep: Seemingly worked, but i had a Bluescreen shortly after. Would need to watch it for longer to make sure if its a general issue or sleep-related. (I usually dont use the Sleep function) ThinkCentre M710t ReBar BIOS.zip

Hi @Tectrek . How did you enable Coffee Lake and Coffee Lake Refresh? I am wroking on an M920Q and Using an I7 8700 with intel chipset 300 series and Intel Arc 380. Got 4g Decode working and some games seem to go up to 5 Gig VRAM usage, but My scenario is for AV1 encoding and ReBar is mandatory in that instance. Thanks.

[wakawaka888]

Motherboard: AsRock Z97 Extreme6
GPU: Tesla P40 24 GB, AMD RX 6900 XT
UEFIPatch: Yes
DSDT Patch: Yes
BAR Size: Doesn't show up in GPU-Z
RAM: 32 GB
Resume from Sleep: Yes

CPU is i7-4790K - Devil's Canyon. I used the Haswell instructions.
Tested using OCCT. No errors, no system instability.
I set RebarState to 32 with no problems.

DSDT had to be cut down a lot to work, I just barely got it small enough to squeak by. SLI is disabled as a result. I used the modified BIOS from Lost-n-BIOS on Winraid for this mobo as a starting point to expose Above 4g Decoding in the UEFI menu before installing ReBar. Prior to patching and using ReBar, the GPU would error out on code 12 without fail, independent of any drivers, and cause frequent system freezes and crashes whenever installed. My BIOS, Lost-n-BIOS' original BIOS, and my modified DSDT's are available here, to make this easier for anyone else on this same board: https://github.com/wakawaka888/Z97EXTREME6-unlocked_BIOS

Photos:

[OXkmn]

created account to say thanks!!! also
i7 3770K , z77x-d3h rev1.0, ARC750.

1. after inserting the rebar to bios, save new bios file to usb, Qflash without any steps in between.
2. when activating above4g, it will never show in bios, will have to confirm if it is turned on via GPUZ (after using setup_var (offset) 0x0 > reboot > setup_var (offset) 0x1.
3. once GPUZ confirms everything except rebar is on & you've flashed the modded bios, must use Rebarstate.

Confirmed 2gb working -edit- to add screenshots

[hitman72ita]

hi, but just out of curiosity, how much should I set rebar size with an RX5600XT 6gb? now is set to 8gb and it seems to work fine, should I set it to 4gb? another size? thank you

[mvildosolae]

• Motherboard: ASUS STRIX B250F GAMING
• CPU: Intel Core i7 9700F
• UEFI version: 2001
• GPU: AMD Radeon RX 6800 XT (XFX Speedster MERC 319 AMD Radeon RX 6800 XT BLACK Gaming)
• UEFIPatch: No
• DSDT Patch: No
• BAR Size: 16384 MB
• RAM: 48 GB
• Resume from sleep: Works

Notes:

• UEFI was previously modded with CoffeeTime as well to add support for Coffee Lake CPUs on B250 chipset.
• The initial flashing was made with a CH341a programmer. Once the Intel flash descriptor was unlocked, further flashes were performed via FPTW64.
• PC shows no image until Windows is booted (can't enter UEFI either). If AMD's graphic driver is not installed, no image will be shown (though Windows still boots). Can be solved by enabling Remote Desktop before, and remoting from another device to install the graphic driver.
• For some reason, GPU‑Z says CSM is enabled.

Screenshots:

[lordekeen]

• Motherboard: Huananzhi x79 Deluxe v7.1
• GPU: Palit Nvidia RTX 3060 12gb (non-oc version)
• UEFIPatch: No
• DSDT Patch: No
• BAR Size: 16384mb
• RAM: 32gb
• Resume from sleep: not tested
• Notes: I thought it would be difficult because its a x79 system, but this board took it like a champ, just downloaded the last bios from manufacturer, modified using UEFITool following the tutorial and flashed.