the problem of cudnn versions for supporting cudnn acceleration

[Slun12]

Hello Mr. Su. I want to ask you that when you compile time using cudnn version is how much, because I used the cudnn versions 6.0 and 5.1, during the compilation of matconvnet don't support cudnn acceleration. Thank you very much.

[suhangpro]

I remember seeing about 20% speedup. But that was a while ago and the number might be off...