Tested with 1920 x 1080 at 50 percent, here are the result
GPU Compute
GeForce GTX 970 Strix
Tile
64 x 64: 3 Min 55 sec
128 x 128 : 1 Min 55 sec
256 x 256 : 1 Min 31 sec
512 x 512 : 1 Min 22 sec (Best)
768 x 768 : 1 Min 22 sec
1024 x 1024 : 1 Min 23 sec
CPU Compute
Core I5 4690 (3.5 Ghz)
Tile
16 x 16 : 7 Min 4 sec
32 x 32 : 7 Min 3 sec (Best)
64 x 64 : 7 Min 51 sec
128 x 128 : 8 min 34 sec
256 x 256 : 8 MIn 10 sec
512 x 512 : 13 min 37 sec
768 x 768 : 20 min 33 sec
Used the same settings with the BMW scene
My System:
CPU: Intel i5 3.20GHz
GPU: Radeon RX 570
RAM: 16GB
OS: Windows 10 64bit
Testing results ordered from fastest setting to slowest:
Tile 512x512
OpenCL: 1min 38sec (faster then i thought)
CPU: 12min 11sec
Tile 1024x1024
OpenCL: 1min 39sec
CPU: din’t testet it to the end ~20 min if the remaining time is correct
Tile 64x64
OpenCL: 1min 59sec
CPU: 5min 12sec
Tile 128x128
OpenCL: 2min 01sec
CPU: 5min 12sec
Tile 32x32
OpenCL: 3min 24sec
CPU: 5min 09sec
Tile 256x256
CPU: 6min 07sec
OpenCL: 6min 20sec
i think i stick to the 512x512 Tile setup with the GPU Compute on, seams to be fitting the best to my system.
