My time:
CPU: Intel i5 3.5Ghz
GPU: Nvidia GTX 980
OS: Windows 10 64bit
Time: 1 min 11 seconds (GPU - CUDA)
Tiles: Center, x:480, Y:540
Time: 5 min 08 sec (CPU)
Tiles: Center, X: 64, Y: 64
My time:
CPU: Intel i5 3.5Ghz
GPU: Nvidia GTX 980
OS: Windows 10 64bit
Time: 1 min 11 seconds (GPU - CUDA)
Tiles: Center, x:480, Y:540
Time: 5 min 08 sec (CPU)
Tiles: Center, X: 64, Y: 64