Quote - > Quote - I just ran a very strange extremely un-scientific test.  I ran the same image for 2 minutes, first with CPU only then with GPU acceleration.  

CPU only had .86 S/p at 21 kS/s.  GPU accel got 3.8 S/p at 102 kS/s.  

**But **the CPU only image looked better and was clearer.  Why did that happen? I don't normally use GPU accel because I like to play games while a render is running and I never saw much of a difference in speed the few times I tried it, but I can't understand why the image looks so much worse if it's running faster by the numbers.

 

Yes, it is the same for me. The CPU rendered image looks MUCH better even with a lot less samples. This have been the same for me since the first version of lux that supported it. That is why I don't use GPU accelleration. I'm using an nVidia 580, you?

Radeon HD 6950 2GB unlocked and overclocked (so it's essentially the same as the 6970).