My time:
CPU: Intel i7 6700K 4.0GHz
GPU: Nvidia GTX 780
OS: Windows 7 64bit
CPU
Tile Size - 32X32 Time - 2:50
Tile Size - 64X64 Time - 2:53
Tile Size - 124X124 Time - 3:02
Tile Size - 248X248 Time - 3:23
Tile Size - 240X135 1/8 Resolution / 2
Tile Size - 120X68 Time - 2:58
TIle Size - 240X135 Time - 3:17
Tile Size - 240X270 Time - 3:30
GPU
Tile Size - 32X32 Time - 20 min +
Tile Size - 64X64 Time - 5 min +
Tile Size - 128X128 Time - 1:58
Tile Size - 256X256 Time - 1:26
Tile Size - 240X270 Time - 1:21
Tile Size - 512X512 Time - 1:18
Tile Size - 512X540 Time - 1:16 ------ Best TIme
Tile Size - 480X540 Time - 1:16 ------ Best Time
Tile Size - 960X540 Time - 1:20
I decided to post all of my trial times because maybe it will help someone down the line. But my best Time was my GPU at 480X540