mmp/pbrt-v4-scenes

Support sm_52 devices?

oscarbg opened this issue · 1 comments

oscarbg commented

Hi,

I tried to build pbrt-v4 on a system with GTX 970 (Maxwell GPU).. seems unsupported claiming sm_53 minimum..

it's a little unfortunate since this devices are still supported by Optix 7.5 (latest versions):
"● All NVIDIA GPUs of Compute Capability 5.0 (Maxwell) or higher are supported"

hacked the build and seems getting lots of half errors in CUDA code..
*question is: how much effort is needed to enable support on this devices?

I mean can't be a question of performance as even sm_60 devices (Pascal) had abismal low FP16 performance (many times slower than FP32) at least the geforce parts not GP100.. little FP16 units were added only for developer playing with FP16 early..

all the GPU performance gained vs CPU from PBRT is due to Optix, right?

thanks..

oscarbg commented

wrong site mmp/pbrt-v4#292