I think my evga 8800 GTX fan died. So, i am using my on-board Graphics on my Dell Optiplex 755 MT (Yes, I put a double bracket GPU in a dell optiplex). I turned my PC on a few minutes ago, and my computer boots up normally at the dell boot screen, then after the boot screen, my computer made an odd buzzer like noise, and when that happened, my computer screen glitched for a split-second and then went black. So i turned It off and took the cover off and started it again, I saw that my GPU fan was not spinning. So I turned it off, took it out. Then I looked for my backup GT 610. I could not find it so I used my on-board Graphics. My computer booted fine. Is my GPU fan dead? My dad says my graphics card might be not in the PCI-E port on the board, so I am going to try that now.