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Just hooked up a new GPU to my rig for crossfire and 1 adapter disabled?

I have an ECS P67H2 A-2 mobo, i5 3570k pcu (BIOS updated for the mobo compatibility with sandy bridge works great) Was using a powercolor 7870 tahiti LE,and today bought an ASUS 7850 to crossfire and hooked it up, the bridge connection as well. Takes a bit for 'starting windows' saw nothing in BIOS about crossfire, though I know my mobo supports it. Both GPUs are on and powered and I installed the drivers for the new one, but in CCC the second GPU is 'adapter disabled' and there are no settings in CCC for crossfire enabling. Please help!
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  1. Best answer
    You have to crossfire the 7870 tahiti le with a 7900 series card. It won't crossfire wtih the 7800 series. It uses theTahiti architecture and the rest of 7800 series uses the Pitcairn architecture.

    "PowerColor's HD7870 PCS+ Myst Edition shows its Tahiti roots when it comes to CrossFire configurations; you cannot pair it up to a normal Radeon HD 7870. Matching it up to any Radeon HD 7900-series card isn't a problem, though"
    http://www.tomshardware.com/reviews/tahiti-le-7870-7930-benchmark,3401-5.html
  2. peer_o said:
    You have to crossfire the 7870 tahiti le with a 7900 series card. It won't crossfire wtih the 7800 series. It uses theTahiti architecture and the rest of 7800 series uses the Pitcairn architecture.

    "PowerColor's HD7870 PCS+ Myst Edition shows its Tahiti roots when it comes to CrossFire configurations; you cannot pair it up to a normal Radeon HD 7870. Matching it up to any Radeon HD 7900-series card isn't a problem, though"
    http://www.tomshardware.com/reviews/tahiti-le-7870-7930-benchmark,3401-5.html


    This. Your best bet is another 7870 XT / Myst / Tahiti LE.
  3. ah wish the guy at micro center knew that.. Time to drive another hour to return this to spend more.
  4. clueless1126 said:
    ah wish the guy at micro center knew that.. Time to drive another hour to return this to spend more.


    I would definitely complain about it to a manager or something. I mean that guy wasted a bunch of your time.
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