OS: Windows 8.1 64bit
GPU: nVidia GeForce 840M
CPU: intel Core i7 4510U
The times I got are:
CPU:
1616 => 14:03.89 (best)
3232 => 14:26.63
6464 => 16:55.89
128128 => 18:00:48
256*256 => 17:12.41
RES matched:
120135 => 7:21.77
240135 => 7:09.37 (best)
240270 => 7:10.42
480270 => 7:39.27
240*180 => 7:15.99