Second Graphics Card Not Detected

whitechili · Jan 14, 2015

I recently bought a second EVGA GTX 760 sc acx to add to my pc. My motherboard is an MSI Z97 gaming 5 motherboard. I have an i7 4790k cpu. For reason, my computer won't detect the second graphics card. I have an 850watt PSU from seasonic so that is not the problem. Could someone help? It is not detected in windows, or gpu-z. Is there a setting in my BIOS that disables the other slots? If so could someone tell me where it is? Thanks!

Darkbreeze · Jan 14, 2015

Do you have PCI power cables attached to all necessary external power ports on both cards?

In which slot is the second card installed?

Do you have an SLI bridge installed?

whitechili · Jan 14, 2015

Darkbreeze :

The second card is installed in the PCIex16 slot right below the first one. My psu is modular, so I will try plugging the cable into a different pcie cable port on the psu. I have an sli bridge installed.

Darkbreeze · Jan 14, 2015

Try swapping positions with the cards. Sometimes simply reseating them does the trick. Other times one card apparently thinks it has to be the Alpha male.

Make sure ALL power headers on both cards have the appropriate cabling attached.

Make sure the cabling into the modular PSU are FULLY inserted and locked in place.

You might also need to fully uninstall the drivers using display driver uninstaller (Use the DDU to uninstall. Uninstalling from Programs and features doesn't always remove relevant registry entries) and reinstall the drivers WITH both cards installed.

Display driver uninstaller: http://www.wagnardmobile.com/DDU/ddudownload.htm

Nvidia drivers: http://www.nvidia.com/Download/index.aspx?lang=en-us

whitechili · Jan 22, 2015

The solution was in my bios i had to set the lanes to 8x/8x/0 instead of 16x/0/0.

Darkbreeze · Jan 22, 2015

You had to manually set the lanes? Well, at least you got the problem corrected. Glad to hear it.

sblue · Nov 6, 2018

whitechili :

How did you do that manually? Can you describe a bit detailed please, since i am having troubles as well, thanks

Darkbreeze · Nov 6, 2018

Yeah, that's pretty weird. Normally PCI slots are auto configured based on what is installed in each slot.

sblue · Nov 6, 2018

Darkbreeze :

darkbreeze, if you got time on your hands, would you be willing to help guide me on the right path with my existing issue, which is slightly the same as above?
I have asked the community, but havent got any responses yet :/

Darkbreeze · Nov 7, 2018

Link?

BurgerandChips66 · Nov 7, 2018

http://www.tomshardware.co.uk/answers/id-3817256/msi-z87-g45-gaming-sli.html

sblue · Nov 7, 2018

Darkbreeze :

http://www.tomshardware.co.uk/answers/id-3817256/msi-z87-g45-gaming-sli.html
As BurgerandChips66 linked

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Second Graphics Card Not Detected

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