Buying two hd 4770 for crossfire, it says it requires 550 watts for crossfire, but sometimes its overrated... I'm wondering if the OCZ ModXStream Pro OCZ500MXSP 500W is enough for those two cards. If it isn't then I'll buy the 550 version.
We have another technical review where a single 4770 was used with an overclocked quad core. The power measurement was done at the wall outlet and included all components inside the pc case. At full load the pc drew 369 watts. Here's a link to the power consumption page:
Finally we have one more review where a single 4770 was used during a game of S.T.A.L.K.E.R. - Clear Sky at 1280x1024 resolution with high image quality. The total power consumption for all components inside the pc case case was 245 watts. Here's the link: