Some power tests (measurements taken at AC input of power supply):
Using: Opteron 4240 CPU and AMD FirePro W7000 GPU
Testing parameters for 100% load: stress -c 12 (running in a debian dvm set to use 12 vCPUs)
Powered down → 2.5 Watts
Idle → 150 Watts
100% load → 330 Watts then crept up to 350 Watts