CPU: Intel i7 2.5 GHz
GPU: Nvidia Geforce 940M
OS: Windows 10pro 64bit
Time: 9 min 18 seconds (GPU - CUDA) 32 x, 32 y
Time: 10 min 6 sec (CPU) 40 tiles
You should be able to get a lot faster on the GPU if you move up to the 256x256 range
I thought it would to, but it just keeps going up to 10 mins and above the higher I go. Will play around with it some more later in the week.