Only one video card works when both are in (980 GTX)

[Tony LeRoy]

I have a dual 980 GTX setup. I had a dual screen setup and My monitor went out so I set my cards up to be SLI I had this setup for a while and everything was fine. Now, My computer only detects one video card in. I went through the troubleshooting steps and verified all my components work.

1.) Tried card 1 in PCI-E slot 1. Worked
2.) Tried card 2 in PCI-E slot 1. Worked
3.) Tried card 1 in PCI-E slot 2. Worked
4.) Tried card 2 in PCI-E slot 2. Worked
5.) Tried card 1 in slot 1 and card 2 in slot 2. Card one worked, and card two gives "DVI No Signal"
6.) Tried card 2 in slot 1 and card 1 in slot 2. Card two worked, and card one gives "DVI No Signal"
7.) Interchanged power cables between steps and also tested voltage according to pinouts. Everything checks out.

Device manager only reads my onboard Intel graphics 4600 chip and one GTX 980s. This one has me stumped.

Also I have a Z97x-Gaming 3 mobo, and a Corsair 1200 watt PSU.

 

[RobCrezz]

If its running in SLI, thats normal. Only the primary card should be used for video output in a SLI config.

Try disconnecting any screens from the second card and the integrated graphics, then boot the computer like that.

 

[Tony LeRoy]

If its running in SLI, thats normal. Only the primary card should be used for video output in a SLI config.

Try disconnecting any screens from the second card and the integrated graphics, then boot the computer like that.

I only have one monitor as I tossed the old one when it went out. Probably should have stated that. Sorry.
I hooked the cards back up and I put the bridge back on as I first had it when I noticed this issue. Is there a way to get them out of SLI just to be sure that both cards are being read? In the device manager and the Nvidia Control Panel I am only seeing one card as stated. No SLI tab anymore

And thanks for the reply. Still new to dual graphics card setup.

 

[RobCrezz]

Do you have any other PCI-E cards except for the graphics cards? How about any m.2 drives or devices?

 

[Tony LeRoy]

Nope, the only two PCIE cards I have are my graphics cards and they’re the only two PCIE slots being used. The third is empty. I can’t fit anything into it though since it doesn’t have that much clearance due to the closeness to the PSU

 

[RobCrezz]

Try resetting the bios to defaults. Check its not forcing one slot to x16 mode (you need to be running in 2 8x 8x for SLI).

If still no good, try a bios update to the newest one.

 

[Tony LeRoy]

Try resetting the bios to defaults. Check its not forcing one slot to x16 mode (you need to be running in 2 8x 8x for SLI).

If still no good, try a bios update to the newest one.

I’ll try this when I get home. For some reason in my bios I cannot set the lanes manually. I haven’t changed anything on the bios since I’ve had my pc (3 years) so I’ll look more in depth on this

 

[Tony LeRoy]

Tried to update the bios, and I got an error in the qflash utility and it said "no drive found". I set my bios to default and got the no operating system error so I messed with the boot order and got it working. Still no second card found

 

[RobCrezz]

Try the @bios utility:
https://www.gigabyte.com/Motherboard/GA-Z97X-Gaming-3-rev-10#support-dl

 

[Tony LeRoy]

Try the @bios utility:
https://www.gigabyte.com/Motherboard/GA-Z97X-Gaming-3-rev-10#support-dl

Thanks for the link. Downloaded, ran, updated bios to F7. Still no second card.

 

[RobCrezz]

Have you tried disabling the Integrated graphics in the bios?

 

[Tony LeRoy]

Have you tried disabling the Integrated graphics in the bios?

Sorry for the late reply. I've been working and have classes as well. That didnt work. that just left me with one card detected haha. my 980 gtx. I re-enabled them again

 

[RobCrezz]

Sorry, im out of ideas. Not sure why the second card isnt being detected.

 

[Tony LeRoy]

Still havent got this figured out. any more ideas?

 

[Tony LeRoy]

UPDATE:

So in my current setup now, I have my top card working. I unplugged my top card from the PCIE slot and connected my monitor to my bottom card and IT DID NOT WORK. I swapped power cables and it worked. So I placed my TOP card back in and hooked the supposedly bad power connector into it, and it actually worked. now my bottom card is not being detected over again.

 

[RobCrezz]

Ok so sounds like potentially bad PSU or power cable?

 

[Tony LeRoy]

Update #2 I uninstalled all my NVIDIA drivers and swapped cards. I had to uninstall a second time. I reinstalled drivers and I can now see both cards