up vote 0 down vote favorite
share [g+] share [fb]

Here's what are hopefully the pertinent specifications for my computer:

  • 775W Power Supply: so I don't think there's a power problem
  • 16GB RAM
  • Intel P67 Chipset ATX Motherboard
  • Windows 7 Ultimate 64-bit
  • 2x Radeon 6850 HD cards (in "Crossfire") (specs here)

(Full computer specs here)

I installed the 64-bit Windows 7 version of the drivers, and when I restarted found myself constantly frozen on the Windows 7 splash screen logo. I had to boot into Safe Mode and disable the second graphics card, and when I restarted once more Windows 7 booted properly and now uses the single graphics card perfectly fine.

The problem now is I obviously want to leverage the power in that second graphics card too via ATI's "Crossfire" technology. However, when I reenable the second graphics card in the Device Manager, the screen instantly goes black and I think Windows crashes (I can't make it make noise by pressing hotkeys, and the keyboard modifier lights don't change when I press NumLock, for example), and I have to restart again.

I'm hitting a bit of a brick wall. I've already tried various versions of the drivers from the appropriate website (http://sites.amd.com/us/game/downloads/Pages/radeon_win7-64.aspx) but it seems like Windows just goes into complete meltdown the second I reenable that second graphics card.

link|improve this question
Could you list the actual motherboard model? – Mokubai Mar 10 '11 at 13:10
The system there also claims to be overclocked, have you tried returning it to stock settings? – Mokubai Mar 10 '11 at 14:10
Yes, I have tried returning it to normal settings. It doesn't help with the graphics card issues. – Steve Mar 10 '11 at 14:23
The motherboard model is MSI: MS-7681 - at least I think that's what you're after. – Steve Mar 10 '11 at 14:24
I was mainly wanting to check and see if the Mobo truly supported Crossfire and it looks like it does, searching for MS-7681 sends you to msi.com/product/mb/P67A-GD53--B3-.html which claims to support both SLI and Crossfire. The next thing I'd do would be to swap the graphics cards around inside the PC to see if one of them is broken, if suddenly they both work then cool, if you get nothing then the new primary card is dead and should be replaced and if you still get the same problem then you need to speak with the PC builder about the system as a whole. – Mokubai Mar 10 '11 at 16:09
feedback

Know someone who can answer? Share a link to this question via email, Google+, Twitter, or Facebook.

Your Answer

 
or
required, but never shown
discard

Browse other questions tagged or ask your own question.