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PSU requirements for radeon hd 7770 graphics card crossfire?

Last response: in Components
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October 27, 2012 9:43:35 PM

my rig is

intel core i5 2500k

8gbs of ram

seasonic X650 power supply
both of the cards are the Sapphire Vapor-X radeon hd 7770 GHz edition. will i have enough head room?
a b ) Power supply
October 27, 2012 9:55:13 PM

An 500W could handle those components easily.

The HD7770 would draw like under 100W Max.
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a c 1200 ) Power supply
a c 563 U Graphics card
October 27, 2012 10:04:23 PM

For a system using two Radeon HD 7770 GHz Edition 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 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!!! Total Combined Continuous Power/Current Available on the +12V Rail(s) rated @ 45-50°C ambient temperature, is the most important factor.

The Seasonic X-Series 650W, with its combined +12 Volt continuous current rating of 54 Amps and with four (6+2)-pin PCI Express supplementary power connectors, is way more than sufficient to power your system configuration with two Radeon HD 7770 GHz Edition in 2-way CrossFire mode.
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