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Good psu for crossfire

Last response: in Components
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March 15, 2012 5:09:40 AM

is a 750 watt psu good to crossfire 2 amd 7870s when they are out,and what is the lowest psu wattage my system can take to crossfire them with my hardware?

PC Specs
CPU:i5 2500k
GPU:XFX 5770
MOBO:MSI P67 GD-53
RAM:G.SKILL Ripjaws(4 x 2GB)DDR3 1333
HDD:SAMSUNG Spinpoint F3 1TB
PSU:Corsair TX 750w (broken)
Case:CoolerMaster HAF 912
DVD:ASUS DRW-24B1ST
Cooler:CoolerMaster Hyper 101

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a c 1167 ) Power supply
March 15, 2012 6:35:09 AM

For a system using two Radeon HD 7870 graphics cards in 2-way CrossFireX mode AMD specifies a minimum of an 600 Watt or greater power supply. The power supply should also have a combined +12 Volt continuous current rating of 39 Amps or greater and have at least four 6-pin PCI Express supplementary power connectors.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Total Continuous Amperage Available on the +12V Rail(s) is the most important factor.

If you're overclocking the CPU you will need to add some extra amperage to the combined +12 Volt continuous current rating recommended above to handle it.
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March 22, 2012 12:36:55 AM

Best answer selected by crossfiresli160.
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