My time:
CPU: AMD FX™-8350 8-Core 4.00Ghz
GPU: GeForce GTX 1050
OS: Windows 8.1 64bit
Time GPU (CUDA)
16x16 40 mins (estimated)
32x32 12 min
64x64 5 min
128x128 3 min
256x256 2 min
512x512 2 min 30sec
RES Matched
120x135 3 min
240x135 2 min 50sec
240x270 3 min
480x270 2 min 30sec
960x540 2 min 45sec
Time CPU
8x8 6 min 30sec
16x16 8 min
32x32 6 min 30sec
64x64 7 min 30sec
128x128 6 min
256x256 4 min 30sec
512x512 6 min 30sec
RES Matched
120x135 8 min
240x135 6 min
240x270 6 min 30sec
480x270 11 min
960x540 36 min