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I can't CrossfireX! HD3870 + HD2900XT

post #1 of 37
Thread Starter 
Hi all,

I'm having some issues here,

In the past I had my friend's HD3870 (Sapphire single slot) and my HD2900XT in crossfire on Cat 8.5, so yesterday I got myself an HD3870 (Sapphire dual slot) and I installed Catalyst 8.5 + CCC.

Ok so that all goes well until I get into CCC and theres no CF Option (HD2900XT is main card, HD3870 is secondary), so I change the cards around... no luck.

Then I see that Cat 8.2 apparently always works for crossfire, so I Install that and \\/ I get a crossfire option. So I tick the crossfire option and it activates.

I try and run Crysis, BSOD... Ok fine I restart, now I try Race Driver GRI...BSOD, restart then I try 3D Ma...BSOD Damnit!

Anyways, I switch cards around, same thing, install Cat 8.3 and 8.4 Still BSOD's, 8.5 and 8.6 have no crossfire option.

Ok so now I don't know what to do anymore, so I install VISTA :O and guess what? No, wrong, it doesn't have the option in Cat 8.2 Vista.

Is there any way to remedy my problem, I know that both cards work 100% and I know that you can CF HD3xxx and HD2900 series cards and I have done it before.

Thanks guys,

MotoFail
    
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post #2 of 37
there is only one way to fix this, burn all of your ati cards and switch to an nvidia card.
you will get better fps, and you wont run into problems like these
    
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post #3 of 37
Quote:
Is there any way to remedy my problem, I know that both cards work 100% and I know that you can CF HD3xxx and HD2900 series cards and I have done it before.
pretty sure it doesnt work between different generations 2xxx/3xxx or 3xxx/4xxx
here is a chart i found on atis website
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post #4 of 37
Quote:
Originally Posted by dahdout View Post
there is only one way to fix this, burn all of your ati cards and switch to an nvidia card.
you will get better fps, and you wont run into problems like these
don't listen to this fanboy, if i were you I'd sell both those cards and get a 4870 which beats most of Nvidias $600+ cards
    
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post #5 of 37
its does... 2900+3870 need both bridges and 4870+3780 will work should work a single bridge
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post #6 of 37
Quote:
Originally Posted by whe3ls View Post
its does... 2900+3870 and 4870+3780 will work
Not yet


MOTO what's the BSOD?
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post #7 of 37
Quote:
Originally Posted by dahdout View Post
there is only one way to fix this, burn all of your ati cards and switch to an nvidia card.
you will get better fps, and you wont run into problems like these
You would think all the money you have in your rig you would water cool that paperweight of a video card. /wave fanboy
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post #8 of 37
Quote:
Originally Posted by grunion View Post
Not yet


MOTO what's the BSOD?
sorry my bad im a week behind
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post #9 of 37
Quote:
Originally Posted by Grafixs View Post
You would think all the money you have in your rig you would water cool that paperweight of a video card. /wave fanboy
nice one
    
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post #10 of 37
Quote:
Originally Posted by dahdout View Post
there is only one way to fix this, burn all of your ati cards and switch to an nvidia card.
you will get better fps, and you wont run into problems like these
Odd, I could have sworn that the 48XX series was keeping up with cards that cost $200-$300 more?

Hmm, I must have been imagining? Oh wait, they are.

~Gooda~
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