How much wattage is needed to run two Radeon HD 7870s?

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AtomicOxide

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Dec 10, 2013
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I am building a computer with 2 Radeon 7870s and was wondering if a 600W PSU would be enough?

Here is a link to the build (without the cards as they are a separate order)

Thanks in advance!
 
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skywere

skywere

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Dec 7, 2013
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hey,
the AMD Radeon™ HD 7870 GHz Edition specifications on the AMD website say this: 600W power supply (or greater) with four 75W 6-pin PCI Express power connectors recommended for AMD CrossFire™ technology.
so 600 should be enough according to the site but getting a bit better PSU would definitely be better, more like 750+ watt.

hope i helped. :D

source:
http://www.amd.com/US/PRODUCTS/DESKTOP/GRAPHICS/7000/7870/Pages/radeon-7870.aspx#2
 
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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.
 
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