7870Ghz Crossfire PSU

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Immaculate

Immaculate

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Mar 26, 2013
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Will my Corsair TX650 be able to handle Crossfired 7870Ghz OC 2GB

i5-4670K -stock
MSI Z87 G45
G.Skill Sniper 2x4gb CL9/1866
Samsung 840 Pro 128gb
WD BLUE 1tb HDD
CD/DVD

If so how much extra power will I have to spare?
 
Solution
ko888
For a system using two AMD reference design Radeon HD 7870 GHz Edition graphics cards in 2-way CrossFireX mode AMD specifies a minimum of an 600 Watt or greater system power supply. The power supply should also have a maximum combined +12 Volt continuous current rating of 40 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!!! 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.

Overclocking of the CPU and/or GPU(s) may require an additional...
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Tman450

Tman450

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Apr 5, 2012
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I quote from AMD's 7870 page:
600W power supply (or greater) with four 75W 6-pin PCI Express power connectors recommended for AMD CrossFire™ technology.

Yeah, you should be fine. just don't overclock your cards or processor TOO much ;)
 
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ko888

ko888

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Feb 18, 2009
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For a system using two AMD reference design Radeon HD 7870 GHz Edition graphics cards in 2-way CrossFireX mode AMD specifies a minimum of an 600 Watt or greater system power supply. The power supply should also have a maximum combined +12 Volt continuous current rating of 40 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!!! 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.

Overclocking of the CPU and/or GPU(s) may require an additional increase to the maximum combined +12 Volt continuous current ratings, recommended above, to meet the increase in power required for the overclock. The additional amount required will depend on the magnitude of the overclock being attempted.

The Corsair TX Series TX650 (SKU# 75-001315 / CP-9020038), with its maximum combined +12 Volt continuous current rating of 54 Amps and with two (6+2)-pin PCI Express supplementary power connectors, is more than electrically sufficient to power your system configuration with two Radeon HD 7870 GHz Edition graphics cards in 2-way CrossFireX mode. It is deficient by two PCI Express supplementary power connectors so you'll need to use a couple of these for better cable management:

http://www.newegg.com/Product/Product.aspx?Item=N82E16812198016&Tpk=PCI%20Express%20power%20Y%20splitter%20cable&IsVirtualParent=1
 
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Solution
Immaculate

Immaculate

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Mar 26, 2013
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ko888 I think the box the card came in has a molex adapter actually, or some kind of power adapter.
I plan to do this if AMD makes BF4 a bundle like they said they would.
If not, Im looking into a GTX 760. Would this be better on my PSU? Single Monitor 1080p.
Or would a single 7950 be a better option since it has 3gb of memory and 384bit. as opposed to 760/770 256bit/2gb.
 
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