Here's our new MacPro 2x6 Core 2.66 result. Note we are shy on RAM , 8GB, we will retest when more RAM is installed to see if any effect.
We are quite happy with the results so far. Our 3M triangle files render 1080x768 in 2.5-3.5 minutes. These files took 18-22 minutes on our fastest 4core i7 2.6 PCs.
Model Name: Mac Pro
Model Identifier: MacPro5,1
Processor Name: 6-Core Intel Xeon
Processor Speed: 2.66 GHz
Number Of Processors: 2
Total Number Of Cores: 12
L2 Cache (per core): 256 KB
L3 Cache (per processor): 12 MB
Memory: 8 GB
fps range 102.1-108.x
(http://idisk.mac.com/ttalias//Public/benchmark.jpg)