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Making the assumption of a standard PC with standard parts and yes, I know there are PSU Calculators, but I'm talking brand names that are good and reliable.

Cheapest possible please!

I want to run say 2 ATI Radeon 5770's in crossfire for a system I want to offer for sale.

fixer1234
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SevenT2
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2 Answers2

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... Lucky ***! (Wish I had those cards... and time for gaming!)

Anyway, jealousy aside, According to the specification page:

450 Watt or greater power supply with one 75W 6-pin PCI Express® power connectors recommended (600 Watt and two 6-pin connectors for ATI CrossFireX™ technology in dual mode)

William Hilsum
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1

if you're running crossfire on a 57xx series, the GPU's are quite low power (in comparison to 48xx series and nvidia GPU's)

so corsair's value range should be fine (VX series if they do them in the required power range), antec, Enermax and OCZ all make decent PSU's too

this article page has a power consumption chart for ati crossfire cards.

as has been said, go for an 80+ certified and you should be fine (most efficient at 80% of maximum load)

geocoin
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