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Crossfire Hd 6870 with Hd 6850?

Last response: in Graphics & Displays
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February 10, 2013 2:24:20 PM

Hello all, I have a xfx hd 6870 currently in my pc. I got my hands on gigabyte hd 6850 for really cheap. I have been told before that I can run crossfire with both these cards but my 6870 will be down clocked to a 6850 Is This possible to crossfire these two cards?? What would I gain by doing so?


One other question I have to ask what is the performance difference between running at 16x vs 8x

More about : crossfire 6870 6850

a b U Graphics card
February 10, 2013 2:30:58 PM

1st rule of crossfire. you need two same card to create a Crossfire X system like 2x6870 or 2x6850.

and who told you that you can do ? someone from this forum ??
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February 10, 2013 2:38:12 PM

No, It should work, just the 6870 will run at 6850 speeds, so I would get a 6850. And there is little difference between x16 and x8. You could probably run at x4 with MAYBE 4fps drop, the eyes don't notice something like that.
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February 10, 2013 2:51:29 PM

ghostconn said:
I was told by a friend of mine that it was possible with any series of amd graphics cards so long as they have the same gpu. Take a look hear.....


There are hundreds and hundreds of people calming that it will work flawlessly but yet the odd person said no?????


http://www.tomshardware.com/forum/369946-33-6850-6870-c...

http://www.overclock.net/t/1220192/crossfire-question-6...

Again, it will work, just at the speed of a 6850. The reason why that one guy said no is he's probably used to nvidia sli, where you have to have the same card.
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a b U Graphics card
February 10, 2013 3:05:59 PM

sorry really sorry for giving the wrong information.

yes you can.. Cards just have to be the same #X## (100's and 1000's obviously also) series to be able to X-fire ... a 6950 will x-fire with a 6990 ... but a 6970 will not X-fire with a 6870.

again sorry :( 
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February 16, 2013 11:36:30 PM

no problem thanks for the help everyone. I just used my amd driver to overclock the 6850 to match the 6870. Works AWESOME!!! I get 50-60fps in every game I have tried so far.
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