5Mh/s @ 1800-1850W 220V
1000/1250W PSU Nexus/Seasonic
2x 7990, 3x 280x undervolted underclocked
everyday pc also for gaming 4670K with oc...
needs better case.
3x280x @ 2,1Mh/s undervolted underclocked, 780W whole pc max.
How much these cards contribute power when underclocked ? kh/s ?