Hi,
I tried to render a car with cycles the other day (with GPU CUDA) but it stopped with only about 1/10th of the image finished. Blender did not crash but I got a lot of (mostly the same) errors in the system console.
It started with a list of about 100 times this error: CUDA error: Unknown CUDA error value in cuMemAlloc(&device_pointer, size)
followed by 20 times this error: CUDA error: Unknown CUDA error value in CuMemFree(cuda_device_ptr<mem.device_pointer))
I tried to fix it by changing the TdrDelay in my registry, unfortunately without success. Lowering the samples and/or image resolution fixed the problem. (I tried to render 400 samples on 1920x1080 at first)
Then I also noticed an error when previewing the model in the 3D viewport. It renders some samples, then I get this error and it simply stops updating: CUDA error: Launch failed in cuCtxSynchronize
When testing with a simple scene of a few Suzanne-models, I got the same error.
Does anyone know how to fix this or whether I should report this as a bug? I would really appreciate it!
System: Windows 8.1
GPU: Geforce GTX660Ti
GPU driver: 337.88 (the newest)
Blender 2.70a