NVIDIA 1660ti throttling despite low temperatures?

[PaperOrb]

On a popOS 22.04 laptop with gtx 1660TI mobile that's plugged into AC power. This throttling is a recent problem despite temperatures being 60C or lower. I've tried multiple driver updates and downgrades and setting it to high performance mode while using only the dedicated GPU. Currently on nvidia-driver-530.

Here's the output of nvidia-smi -q -d PERFORMANCE, which shows that both SW power and thermal slowdown are active after merely tabbing between terminal windows (no other apps were open).

$ nvidia-smi -q -d PERFORMANCE
==============NVSMI LOG==============
Timestamp                                 : Thu Jun 15 15:44:27 2023
Driver Version                            : 530.41.03
CUDA Version                              : 12.1

Attached GPUs                             : 1
GPU 00000000:01:00.0
Performance State                     : P5

Clocks Throttle Reasons
Idle                              : Not Active
Applications Clocks Setting       : Not Active
SW Power Cap                      : Active
HW Slowdown                       : Not Active
HW Thermal Slowdown           : Not Active
HW Power Brake Slowdown       : Not Active
Sync Boost                        : Not Active
SW Thermal Slowdown               : Active
Display Clock Setting             : Not Active

If I wait a few seconds after I tabbed between terminals and run nvidia-smi -q -d PERFORMANCE again, there's no SW power cap or SW thermal slowdown. In essence, it throttles if anything new is drawn to the screen at all.