1500W and it is CERTIFIED to run a SLI-Setup, I am seriously impressed like... not at all...
Quad-SLI + QuadCore... lets sum it up shortly:
4xGTX = 4x 150W
Quadcore = 130W
all the other stuff = 100W
830W... so... you could run roughly two of those systems with that useless piece of non-sense.
As you may presently yourself be fully made aware of, my grammar sucks.