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2 5850 in crossfire, will my psu handle it?!?!

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  • Graphics Cards
  • Crossfire
  • Graphics
  • Product
Last response: in Graphics & Displays
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September 30, 2009 11:17:37 PM

here all the specs of new my build:
motherboard is a Asrock x58 extreme
antec 1200 case (5 120mm fans, and the one big one on top)
x1 60mm fan, x1 80mm LED fan
x1 1TB Seagate HDD (used for xp)
x2 640gb WD Black HDD (raid 0 setup)
core i7 920 (it will be overlcocked from 3ghz to 4ghz, as stable as i can get it)
syth mugen cpu cooler (120 mm fan)
gigabyte or linksys wireless card
x1 CD/DVD drive
x1 Multi-reader card that came with my first pc
umm i think thats about it
i am getting a 5850 (want to crossfire)

this is my psu:
CORSAIR CMPSU-750TX 750W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Compatible with Core i7 Power Supply - Retail

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

my first guess is that i will be ok running 2 5850's in crossfire but not
%100 sure, so i need some opinions

More about : 5850 crossfire psu handle

a b U Graphics card
September 30, 2009 11:23:07 PM

Should be fine, as that is a good PSU. The TDP of the 5850 is about 150-160W, so two of those only consumes 320W max. The rest of your system is high end, but I can't see it overloading 720W (60A * 12V) or in other words being 400W without the GPUs. So I think you are all set. Enjoy!
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a b U Graphics card
September 30, 2009 11:25:39 PM

It will be completely fine.
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September 30, 2009 11:27:42 PM

thanks for the replies. i assumed it would be fine but hey, you never know...lets hope my first crossfire experience is AWESOME!
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a b U Graphics card
September 30, 2009 11:29:57 PM

Yep.

If you want further reassurance, this article (which tested the actual power used by the cards) suggests 55+ amps on the 12V rail(s), so you nailed it (and have a decent factor of safety as well).

http://www.guru3d.com/article/radeon-hd-5850-review-cro...
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a b U Graphics card
September 30, 2009 11:50:24 PM

I've run all sorts of crossfire configs, with really terrible no-brand psu's. It very rarely fails, because pc's very rarely get to within 50% of the 'load' values you see in benchmarks.
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September 30, 2009 11:54:24 PM

EXT64 said:
Yep.

If you want further reassurance, this article (which tested the actual power used by the cards) suggests 55+ amps on the 12V rail(s), so you nailed it (and have a decent factor of safety as well).

http://www.guru3d.com/article/radeon-hd-5850-review-cro...

just read it, shortly before i posted this thread, its what made me finally decide to get a 5850 for $260, and im sure the price will drop by x-mas so i can get my grandma to buy me a 2nd :) 
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