Crossfire Hd 6870 with Hd 6850?

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
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More about crossfire 6870 6850
  1. 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 ??
  2. 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.
  3. 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-crossfired

    http://www.overclock.net/t/1220192/crossfire-question-6850-with-a-6870
  4. 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-crossfired

    http://www.overclock.net/t/1220192/crossfire-question-6850-with-a-6870

    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.
  5. 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 :(
  6. 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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