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Cant do spaced 2way SLI on Evga E758 3XSLI mobo

post #1 of 12
Thread Starter 
Hey, I recently got a second gtx480 to sli with my current one. Problem is the mobo won't recognize the second gtx480 because its in the bottom most slot while the other is in the top most pci-e slot. When I boot into windows it says I only have one gtx480. When I sandwich the cards in the top two slots, my mobo recognizes the two gtx480's and I can enable sli. I want them spaced out because the top card gets very hot when sandwiched and I want it to get more air. Does this mean my mobo has a dead pci-e slot?
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post #2 of 12
Try booting from the suspected deal pcie slot?
post #3 of 12
You are using the 3 way bridge aren't you. That wont work.
    
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post #4 of 12
Thread Starter 
Quote:
Originally Posted by Bit_reaper View Post
You are using the 3 way bridge aren't you. That wont work.
Well, I have tried both and neither work. I will admit I tried it first with the 3way sli hard bridge.
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post #5 of 12
Thread Starter 
Now I have booted in the suspected dead slot and it is working fine. It says the card is running through a pci-e 8X slot. Since the top card is running in a pci-e 16X slot could that be causing the problem?
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post #6 of 12
No you can run sli in 16x/16x, 16x/8x or 8x/8x and it will still work fine.
    
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post #7 of 12
I have the same mobo but am using 470's in sli on the top and bottom slots. I to did have this problem at first, I would on 1 card uninstall drivers and reboot. Then power down reinstall or reseat both cards and sli bridge, don't forget the 8 pin power cables, be sure they are fully seated. Now boot up and reinstall graphics driver Or update to a newer version if needed. download driver before you remove the old ones, so you are ready after installation of the second card. BTW The hard 3-way sli bridge will and does work in any configuration. Running in 8x is fine even with a 480 just a slight loss of potential fps, very minimal !!! If that still doesn't work I would recheck all cables and reseat the cards again.
post #8 of 12
Thread Starter 
I got it to work and both gpu-z were recognized by the mobo but for some reason I couldnt get into the control panel to enable sli so I restarted the computer and now the bottom one isnt recognized again. I didnt change anything just restarted the computer. Anyone have any ideas?
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post #9 of 12
Thread Starter 
Quote:
Originally Posted by X-Ringcutter View Post
I have the same mobo but am using 470's in sli on the top and bottom slots. I to did have this problem at first, I would on 1 card uninstall drivers and reboot. Then power down reinstall or reseat both cards and sli bridge, don't forget the 8 pin power cables, be sure they are fully seated. Now boot up and reinstall graphics driver Or update to a newer version if needed. download driver before you remove the old ones, so you are ready after installation of the second card. BTW The hard 3-way sli bridge will and does work in any configuration. Running in 8x is fine even with a 480 just a slight loss of potential fps, very minimal !!! If that still doesn't work I would recheck all cables and reseat the cards again.
Thanks, this fixed the problem. Just sucks a little bit cause I lost a little performance in benchmarks but its not a big deal.
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post #10 of 12
THANK YOU for the rep and I was glad I could help.
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