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Cross Fire isn't working

post #1 of 20
Thread Starter 
Title says it all.

Please look at my sig rig minus the GTX 285. I now have 2 Diamond Radeon HD 6870 XOC's and I put them in and connected the strap and nothing happens.

The second card is not seen. Any idea's on what I did wrong.
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post #2 of 20
Have you gone into catalyst control center and activated crossfire?
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post #3 of 20
Quote:
Originally Posted by Michael Cox View Post
Title says it all.

Please look at my sig rig minus the GTX 285. I now have 2 Diamond Radeon HD 6870 XOC's and I put them in and connected the strap and nothing happens.

The second card is not seen. Any idea's on what I did wrong.

I'd also check the bios for pci-e configuration settings.
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Mighty-iTX
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post #4 of 20
Thread Starter 
Quote:
Originally Posted by omnius19 View Post
Have you gone into catalyst control center and activated crossfire?
Yes, it doesn't even show me the option to turn it on.
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post #5 of 20
Thread Starter 
Quote:
Originally Posted by grunion View Post
I'd also check the bios for pci-e configuration settings.
Please elaborate a bit for me and tell me what I should be looking for.
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post #6 of 20
Did you wipe your system of the nvidia drivers and install 11.4?
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post #7 of 20
Should show up in device manager at least.
Could test one card at a time to make sure there are no DOA.
Board looks like it has auto 16x -> 8x/8x switchover but you might want to verify there are no jumpers/etc to change.
Waiting on X399
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Waiting on X399
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post #8 of 20
Thread Starter 
Quote:
Originally Posted by razr m3 View Post
Did you wipe your system of the nvidia drivers and install 11.4?
I did and downloaded the drivers off the website not the DVD.
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Never Happy!
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post #9 of 20
Thread Starter 
Quote:
Originally Posted by beers View Post
Should show up in device manager at least.
Could test one card at a time to make sure there are no DOA.
Board looks like it has auto 16x -> 8x/8x switchover but you might want to verify there are no jumpers/etc to change.
Here's what shows up in Device manager.
Never Happy!
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Hard DriveOptical DriveOSMonitor
WD Black 1Tb Liteon Windows 7 (64 bit) ASUS 24" HD & Samsung 20" 
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Never Happy!
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Q9550 oc 4.0 Stable @ 1.37V Gigabyte EP45T-USB3P Two Diamond HD 6870 XOC in CrossFire 8GB Corsair XMS3 1600 
Hard DriveOptical DriveOSMonitor
WD Black 1Tb Liteon Windows 7 (64 bit) ASUS 24" HD & Samsung 20" 
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post #10 of 20
Yeah if it is not showing up in ccc or device manager, one of the cards may be doa. Test them one at a time to see if one of them is no good.
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The Build
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