Currently the Fox Renderfarm deploys 2000 workstations and there will be more in future.
The hardware specification of each machine:
Processor:Intel Xeon E5560 * 2, 16 cores with hyper-threading
Local networking: 10Gbps
OS: Win7 64bit
1. 200Mbps internet access
2. Hardware firewall
A screenshot of "Windows Tasks Manager" of the rendering workstation: