I have two graphics cards in my system, both Nvidia Quadro 4000. One always works regardless, the other appears and disappears from device manager randomly and doesn't work for a while. An hour later of swapping the cards around, turn off and on the switch at the wall, it normally works again.
Both the cards work fine in my other computer. However, only one seems to work in this PC.
I have tried all combinations of PCI slots, PCI Power, different BIOS versions, forcing PCI Express 2.0 in the bios and even using another graphics card in place of the second Quadro, which still doesn't work, even on its own.
The motherboard has its additional power connector connected for multi GPU setups. I'm not using SLI as it’s not required, however I have tested them using a bridge and i get same issues.
Originally I was using ESXI PCU pass-through, but It’s much easier to diagnose these issues in windows.
I don't believe this is a driver error, as both windows and ESXI randomly stop seeing this card.
I think the PSU is okay, however I have not tested another one, I think that is my next step.
- Intel i7 3770
- MSI Z77 Mpower Motherboard
- 600W OCZ PSU