Re: 8 HD 5770 GPUs on a Big Bang Marshal?

You're going to need about 2 * 1200 watt gold PSUs for that beast imho. So that's at least $500 USD.

You really don't. A 5770 runs at about 100W, so this would be 800W + 300W system overhead = 1100W continuous. An AX1200 would do this fine.