MacPro (late 2013)
3.5 GHz 6-Core Intel Xeon E5
16 GB 1866 MHz DDR3 ECC
GPU: 2x AMD FirePro D300 2048 MB
Rendered the BMW27 test at 1920x1080 50% with Cycles
GPU
128x128 - 3 min 37 seconds
256x256 - 3 min 43 seconds
CPU
64x64 - 3 min 08 seconds
32x32 - 2 min 52 seconds
16x16 - 3min 02 seconds