I'm at a complete loss here.
My video cards were running fine two days ago and now all of a sudden my computer won't pick up the second card. It started yesterday when I was installing a couple of new fans; I had to remove the bottom video card to get at the fan header. When I put everything back together I booted up and noticed Afterburner was only picking up one card. So I opened up the case again and noticed I'd forgot to put on the SLI bridge (durr) so I put it on, booted up again and still Afterburner was only picking up one card.
I went into the Nvidia control panel but it too was only picking up one card and there was no option to enable SLI. I checked device manager and again no second GPU. So the first thing I done was reinstall the drivers (I was using 301.24 at the time). Done a clean install of everything, rebooted, still no sign of the second GPU. So here's a list of everything I've tried:
All of this and still no program picks up the second videocard - not Device Manager, Afterburner, GPU-Z, nothing and there's no option to enable SLI in Nvidia control panel. I don't know what could be causing this, especially as everything was working fine a couple of days ago. The only other thing I can think of is maybe the SLI bridge has gone bad but I don't have access to a spare bridge to test this. Although surely even with a dodgy SLI bridge the second card should at least be being picked up in Device Manager?
So I'm fresh out of ideas and have no clue what caused this. Anyone know what else to try? My full system is in my signature if that helps.
My video cards were running fine two days ago and now all of a sudden my computer won't pick up the second card. It started yesterday when I was installing a couple of new fans; I had to remove the bottom video card to get at the fan header. When I put everything back together I booted up and noticed Afterburner was only picking up one card. So I opened up the case again and noticed I'd forgot to put on the SLI bridge (durr) so I put it on, booted up again and still Afterburner was only picking up one card.
I went into the Nvidia control panel but it too was only picking up one card and there was no option to enable SLI. I checked device manager and again no second GPU. So the first thing I done was reinstall the drivers (I was using 301.24 at the time). Done a clean install of everything, rebooted, still no sign of the second GPU. So here's a list of everything I've tried:
- Both video cards are definitely working; both work fine when plugged into the top PCIe slot.
- The bottom PCIe slot can't be dead; I tried my soundcard in it and it worked fine.
- The cards are definitely seated correctly and the correct PSU cables are attached; when booted the fan on the bottom video card spins.
- I've reinstalled the drivers countless times now. I remove everything with driver sweeper and perform a clean installation each time and nothing. I've tried the 301.24 drivers as well as the new 301.42 drivers and no luck.
- My PSU is 850W so it can't be a power issue; the PSU calculator estimates my system only uses 613W.
All of this and still no program picks up the second videocard - not Device Manager, Afterburner, GPU-Z, nothing and there's no option to enable SLI in Nvidia control panel. I don't know what could be causing this, especially as everything was working fine a couple of days ago. The only other thing I can think of is maybe the SLI bridge has gone bad but I don't have access to a spare bridge to test this. Although surely even with a dodgy SLI bridge the second card should at least be being picked up in Device Manager?
So I'm fresh out of ideas and have no clue what caused this. Anyone know what else to try? My full system is in my signature if that helps.
