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Just added in another GPU, cant get it to recognize - Page 3

post #21 of 53
Thread Starter 
I unplugged my 6970s power and plugged in my monitor to my 460 and booted. After about a minute it finally booted in to BOIS and then into windows. But windows still wont recognize that the GPU is there, even though it is displaying video through it. I guess I will find one of those PCIe x16-x4 adapter ribbon cable things, and see if it will work that way.
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post #22 of 53
Goodtobeking, I had problems with nvidia/ATI mix in a box as well. Seems the ATI card likes to be primary display and also it likes to have its drivers installed before the Nvidia drivers are there... the box won't run the other way...

biggrin.gif
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post #23 of 53
Thread Starter 
Thanks for the advice Tex.

But I did install the ATI drivers first, and had video hooked up to my 6970s. Still couldnt get windows to recognize there was another GPU in there. Could it have somethign to do with my MOBO BIOS?? I looked through it and couldnt find anything I thought would help me.
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post #24 of 53
If its not detecting then its videocard or motherboard related. Test another card in the slot to verify full length cards work in the slot. If another card works then the 5750 is defective, if a different card doesnt work then its the mobo. Good luck.

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post #25 of 53
Don't we end up back at the fact that X-Fire does work with different spec. cards ?

The 6970 is O.K. with the 6950, but not the 5770. Not that I've ever tried more than two in a single system myself.

dunx
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post #26 of 53
I'm ready to test my own 450. I'll be deep cleaning my rig this weekend, hoping to see good results.

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post #27 of 53
Quote:
Originally Posted by 2002dunx View Post

Don't we end up back at the fact that X-Fire does work with different spec. cards ?

The 6970 is O.K. with the 6950, but not the 5770. Not that I've ever tried more than two in a single system myself.

dunx
Correct they need to be from the sam gen. 6k with 6k and 5k with 5k. You cannot mismatch.

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post #28 of 53
Finally identified your Asus from your profile, and I have a similar Maximus III Formula, it has run 3 x GPU's in the past, so I can only suggest it's down to your boards design.

dunx

P.S. Mine has taken a lot of punishment wink.gif and has an NF200 (?) Plex chip (?)
Edited by 2002dunx - 12/15/12 at 9:31am
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post #29 of 53
Thread Starter 
Yeah im not planning on running crossfire with the 3rd card. I know that wont work. Instead I was wanting to use it just as video for web browsing and simple games. Running Milkyway on my gpus makes everything jumpy and I bet it robs me of a little PPD.

I have a 5750 and a 460, neither of which would show up in the device manager. Even though I was able to get video through the 460, when I unplugged the 6970s. Im going to order a PCIe x1-4 cable riser and use it instead. Maybe my MOBO mod didnt work, or it could be BOIS related since IIRC P55 platform only has 16xPCI lane limit.

Like Dark says, its MOBO related because neither the 5750 or the 460 would be detected. Going to try to install my ASUS Xonar DX in the slot, since it is x4.
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post #30 of 53
Well, as i was a bit impatient to see if the cable worked, i tried it on my HTPC. Card wasrecognized and display worked on the one connected to the cable.




Now i know that if it doesn't work on my main rig, it's a mobo issue.

Being a bit curious, i fired up BOINC and tried three projects. I grebbed the tasks, suspended two, and aborted the rest. Then, at the same time, resumed the two tasks, letting the card on the x16 slot to be #0 (top task) and the one on the x1 slot to be the #1 (bottom task). There is a bit of difference, but nothing too big, in fact.

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