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What PSU would i need to power Radeon HD7770 Crossfire?

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January 8, 2013 9:10:52 PM

What PSU wattage would i need to power Radeon HD7770 Crossfire?

Thanks
a b ) Power supply
January 8, 2013 9:58:48 PM

a decent 350w would run them fine.
a c 1194 ) Power supply
January 8, 2013 10:04:47 PM

For a system using two Radeon HD 7770 graphics cards in 2-way CrossFireX mode AMD specifies a minimum of a 600 Watt or greater power supply. The power supply should also have a maximum combined +12 Volt continuous current rating of 30 Amps or greater and have at least two 6-pin PCI Express supplementary power connectors.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Sufficient Total Combined Continuous Power/Current Available on the +12V Rail(s) rated at 45°C - 50°C ambient temperature, is the most critical factor.

Even a Seasonic S12II Bronze 430 Watt power supply is sufficient.

Seasonic S12II-430 Bronze
• maximum combined +12 Volt continuous current rating of 30 Amps
• one 6-pin and one (6+2)-pin PCI Express supplementary power connectors

http://www.newegg.com/Product/Product.aspx?Item=N82E168...
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