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Ask the Experts Question: What PSU should I buy for my Radeon HD 7870 CrossFire system?

What PSU should I buy for my Radeon HD 7870 CrossFire system?
I have two AMD Radeon HD 7870's in CrossFire, which PSU should I buy?
Question asked by Terry from Canada | | Cases, Cooling & PSU Content | Posted:
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Whats the minimum PSU I should have for two AMD Radeon HD 7870's in crossfire and an AMD FX-6100 CPU?

Hi Terry,

 

For your two Radeon HD 7870's in CrossFire, you'll need something in excess of 450-500W. The cards themselves will use around 150W each, so two of them at 100% load, and we're looking at around 300W just for the cards, and another 100-150W for everything else (on average).

 

TweakTown image asktheexperts/1/5/157_01_what_psu_should_i_buy_for_my_radeon_hd_7870_crossfire_system.jpg

 

Corsair do some of the best power supplies in the world, and Newegg currently have the Corsair CX750 PSU on special for $89.99. This is a perfect choice, and not too expensive, but it also gives you some breathing room for future upgrades. Sure, you could get a 500W and probably be fine with it, but it's better to spend $10-$20 more and give yourself ~250W of future-proofing.

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