Tom's Hardware > Forum > Graphic & Displays > Graphics Cards > [Solved] HELP Crossfire 2 4890's

[Solved] HELP Crossfire 2 4890's

Forum Graphic & Displays : Graphics Cards - [Solved] HELP Crossfire 2 4890's

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Best answer from masterjaw.

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jlear3   08-13-2009 at 05:43:06 AM

I just got my 2nd 4890 and was all syked for awesome 60+ crysis fps, and now im about to throw my *** in a dumpster.. these cards work worse in crossfire than alone!! just sitting on the beach lookin at the horizon in crysis i get 90+fps with each card alone, but hook em up together and i get 70-73 WTF ive tried everything, switched and switch used one bridge and 2 bridges someone please help me!!!

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Best answer from masterjaw
BSOD happens because your crappy PSU can't handle the load of 2 4890s. Good for you that it didn't explode at all.
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jlear3   08-13-2009 at 07:20:49 AM

If i run crysis, and watch the gpu activity, only one card is doing all the work, though it seems both cards are working, as they work alone.

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xc0mmiex   08-13-2009 at 07:55:31 AM

can we get more specs on your rig?

------------------------------ http://www.speedtest.net/result/511560750.png
E6600 @ 3.6, 2 X HD4850(680/1150), OCZ 4Gigz
 Reply to xc0mmiex
masterjaw   08-13-2009 at 08:45:16 AM

Specs please. Especially PSU and mobo.

(I hope this case isn't like the one who tries to do crossfire in an asus sli deluxe mobo.)

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jlear3   08-13-2009 at 08:51:30 AM

nope lol,
Phenom II 955
MSI 790fx-GD70
psu is a kingwin 750w modular
2 diamond xoc 4890's
150gb raptor
640gb WD

Reply to jlear3
masterjaw   08-13-2009 at 08:55:34 AM

OMFG! Doing CF with that crappy PSU is a no-no. Get a better one like a 750tx.

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jlear3   08-13-2009 at 08:56:41 AM

lol, wanna buy a nice modular PSU??

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jlear3   08-13-2009 at 09:02:30 AM

yeah im lookin at it right now actually its in my cart rofl, you think that would cause bluescreens too?

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jlear3   08-13-2009 at 09:18:44 AM

im pretty sure it would, cuz this didnt happen till i was using my 2nd 4890 and it only happens when they're being used and the PSU does get quite hot.

Reply to jlear3
masterjaw   08-13-2009 at 09:40:43 AM
Best answer

BSOD happens because your crappy PSU can't handle the load of 2 4890s. Good for you that it didn't explode at all.

Reply to masterjaw
jlear3   08-13-2009 at 05:26:29 PM

lol, tyvm new one in the mail and this ones on ebay

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