My best times were with the GPU using a percentage of the Resolution setting (20% & 25%)
John’s Times:
CPU Intel i5-3350 @3.10GHz (Peak 3.5GHz)
OS: Windows 10 64 bit
GPU: Nvidia GTX 1060 w/6G memory
Tiles: 64x64
CPU: 5+
GPU: 2:57.51
Tiles: 128x128
CPU: 1:46.73
GPU: 1:51.70
Tiles: 256x256
CPU: 7+
GPU: 1:28.43
Tiles: 512x512
CPU: 5+
GPU: 1:27.59
Tiles: 384x216 (20% Res)
** CPU: 5+**
** GPU: 1:23.84**
Tiles: 480x270 (25% Res)
** CPU: 6+**
** GPU: 1:25.63**
Tiles: 960x540
CPU: 25+
GPU: 1:42.64