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6870 Crossfire assistance

post #1 of 20
Thread Starter 
I have never done crossfire or SLI before and know nearly nothing about them so treat me like an extreme noob at this.

I had a 6870 then got another today. I threw it in my PC and put the bridge on. I then booted and updated CCC to 11.6 and tried to find the crossfire option only to find it missing. I then removed the second video card booted and deleted all CCC files then shut down. Put the second card back, in started up, and installed 11.6 again and still don't have the crossfire option.

May I have some assistance in setting my crossfire system up? +rep to all helpful posts.
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post #2 of 20
You should see Crossfire option in CCC under Performance tab I believe. What does Windows show in device manager? Both cards should show up there if they up and powered.
Edited by ezveedub - 7/25/11 at 9:30pm
     
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post #3 of 20
Thread Starter 
My main 1st card is the only one that shows up the new one has power though, the light is on.

I ran vantage and it shows only my main card and I scored 13k LOL
Edited by magna224 - 7/25/11 at 9:42pm
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post #4 of 20
I have a dumb question to ask you.


Did you put the 6pins in the second card?
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post #5 of 20
Well, that at least explains why you don't get Crossfire option. Does the your mobo have any option settings to turn on/off PCIe slots? The cards should be in Slot 1 and 4 and should be detected. Swap cards or remove the card that detected and see if the other card now comes up and works. I don't know that motherboard, so I can't really say how its setup.
     
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post #6 of 20
Thread Starter 
The second card is powered the fan is spinning and it has lights on. I don't believe that my motherboard slots can be disabled, I know little about it as well. So far I miss my old MSI 790FX board a lot. My cards are in slots 3 and 4 since 1 and 2 are the little slots.

Ill switch the cards around right now and see if it changes anything.
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post #7 of 20
Quote:
Originally Posted by magna224 View Post
The second card is powered the fan is spinning and it has lights on. I don't believe that my motherboard slots can be disabled, I know little about it as well. So far I miss my old MSI 790FX board a lot. My cards are in slots 3 and 4 since 1 and 2 are the little slots.

Ill switch the cards around right now and see if it changes anything.
I made a mistake on the slots. If you're using the mobo in your signature, you need to use the two upper blue PCIe slots. The lower one is a 4x slot, so don't bother to use.
     
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post #8 of 20
Thread Starter 
Yeah I'm using the top two blue ones. Neither of my cards would even fit in the bottom blue one if i tried. About to switch my cards.

Edit: Switched card slots and then plugged my DVI into the new card and it wouldn't allow my monitor to turn on. So then I switched he power cords and stated it up fine. It was the power cords that was messing it up I think.
Edited by magna224 - 7/25/11 at 11:05pm
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post #9 of 20
Are they both running now? If it is the power connectors, check them to make sure they are good. Bad connections will burn or run hot when power draw gets high.
     
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post #10 of 20
Thread Starter 
I have 2 black 8pin to 6pin and two red 8pin to 6pin. What does the red mean?
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