TweakTown
Tech content trusted by users in North America and around the world
5,683 Reviews & Articles | 36,177 News Posts
Weekly Giveaway: Fractal Design Arc Cases Contest (Global Entry!)

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

Question asked by Terry from Canada | | Cases, Cooling & PSU Content | Posted:
Ask Question | Comment | Font Size: AA

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.

Related Tags

Do you get our Ask the Experts RSS feed? Get It!

- Sadly we cannot answer every question. There is a friendly community in our forums though who may well be able to help with your tech question!

Post a Comment about this Q&A

Latest Tech News Posts

View More News Posts

Latest Downloads

View More Latest Downloads

TweakTown Web Poll

Question: Did EA kill the Battlefield franchise with the terrible BF4 issues?

Yes, Battlefield is doomed

No, Battlefield will live on strong

I'm not sure, but I know EA needs to improve its game

or View the Results

View More Polls

Forum Activity

View More Forum Posts

Press Releases

View More Press Releases
Get TweakTown updates via Facebook!
Just click the "Like" button below