Tom's Hardware > Forum > Graphic & Displays > Graphics Cards > Would a Seasonic 550watt PSU + 2x 4850 work ok?

Would a Seasonic 550watt PSU + 2x 4850 work ok?

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knickle   07-10-2008 at 10:42:03 PM

My PSU is a Seasonic 550watt PSU and it's only a few months old. I bought it because the reviews on it were quite favorable. My experiences with it have been good. Voltages are very stable.

Enter the HD4850

AMD/ATI lists my PSU as Certified for 2x 3850. But it's not listed under the 4850. I'm not sure if this is because they haven't tested it yet, or if it failed the tests.

It does recommend a 550watt PSU for using 4850s in crossfire. All PSUs are not created equal. So I'm left puzzled.


Thoughts?

Message quoted 1 times
Message edited by knickle on 07-10-2008 at 11:18:12 PM
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homerdog   07-10-2008 at 10:50:32 PM
- 0 +

knickle wrote :

Would a Seasonic 550watt PSU + 2x 4850 work ok?


Yes

Reply to homerdog
aevm   07-10-2008 at 11:03:59 PM
- 0 +

It says 41A combined on the 12V. That's a heck of a lot for something labeled only 550W. Same as the Corsair 550VX, IIRC.
http://www.newegg.com/Product/Show [...] wer+Supply

 

Visiontek recommends minimum 550W for HD 4850 Crossfire with their cards.
http://www.newegg.com/Product/Prod [...] 6814129112

 

You should be OK, assuming you don't have an overclocked quad and 7 HDD and 7 fans and what not.


Message edited by aevm on 07-10-2008 at 11:04:35 PM
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knickle   07-10-2008 at 11:11:13 PM
- 0 +

I have 3 HDs and the Antec Nine Hundred case with four large case fans. The CPU is an aging Opteron 165 with a small 200mhz overclock (I plan to push it to +600mhz with stock cooling).

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strangestranger   07-10-2008 at 11:14:26 PM
- 0 +

it's a seasonic, they rock and they make a ton of other brands psu's including PC&P as well as many others, had a 600W before this one, never a problem

------------------------------ I'm a git, deal with it.

Antec 1200,PC Power & Cooling 750,Gigabyte DS4-x48,Intel Q9550@3.4 W/Xigmatek S1283,8GB OCZ DDR2 800,ATI 4870X2,X-FI>CA 640C amp>Tannoy R300/Senn 595's
 Reply to strangestranger
Gravemind123   07-10-2008 at 11:27:32 PM
- 0 +

A complete Core2Extreme system with a 3.2GHz quadcore and HD 4870 crossfire loads at a maximum of between 400-450W, so you should be fine. The manufacturers assume you are buying a more budget PSU then a SeaSonic, which would likely have very low +12v power, so they over-rate the minimum requirement. They also list the minimum requirement for total system consumption, not just for the 2 cards.

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