PC won't boot when gpu driver is installed, fine when driver is uninstalled.

gijoe50000

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May 27, 2013
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So I got a random Watchdog.sys crash today (video memory scheduler error I think) and afterwards my pc wouldn't get to the desktop. It gets as far as the blue Windows window but then reboots. I can however boot into safe mode so I know my gpu isn't totally dead, and my display is working fine too.

If I uninstall the gpu driver in safe mode with DDU I can boot into normal windows, but when I install a display driver again the install fails halfway through, I get a black screen, then a reboot, just like trying to start up with the Nvidia driver installed. I've had the driver installed for a few weeks before so it's not a faulty driver.
Computer also doesn't seem to know what type my monitor is, I point it to the monitor driver but it says the best driver (Generic non-PnP) is already installed.

SFC gives no errors, chkdsk found and fixed errors after the initial crash. Windows Startup repair, as usual, does nothing. Rollback to the previous OS also fails, and I've got a few 0x0f errors (a required device isn't connected) I assume it's not talking about the gpu or the monitor, because, well it's getting displayed on the screen.

Could it be some component of my GPU that's failed, and the driver can't access it, like a video memory component or something?
And why does it boot fine in safe mode and install the driver in safe mode. This makes me think it might be a software problem..

I've unplugged all unnecessary peripherals and double checked all my bios settings too..
Running Windows insider preview 16257 (latest)
 


If your CPU/RAM is overclocked, did you try with the CPU/RAM at stock settings? You said you tried rolling back on the OS, but did you try an earlier Nvidia driver, like say, 378.78 to see if the issue persisted?
 

gijoe50000

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At stock settings it just hangs at the Windows logo, no black screen or reboot. Which is worse because then I can't get into safe mode (where I am now). When overclocked, after a few auto-reboots I get the diagnosing screen.. and then startup options, so I can get to safe mode.

Tried other earlier drivers and it's the same. The Windows driver does show the gpus as 970s but they don't do much.. No NCP, no stats in hardware monitor etc, just the basic run-of-the-mill display driver.

I also tried booting from my 2nd gpu in the other pcie slot (I have sli) and it booted fine until about 10 seconds into the desktop and everything comes crashing to a halt and the desktop freezes up, weird.

I might try and uninstall the driver and reboot to the second card again and let it install the driver for that card instead, not sure if it'll work though..
 

gijoe50000

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So I uninstalled the driver in safe mode, restarted, jumped into the bios and switched to 2nd PCIe slot and now I can boot fine from the 2nd card. Tried installing the Nvidia driver again, I went for a driver from last month instead Again it failed halfway through and the PC rebooted itself but came back to the desktop fine.
I also managed to get back to the previous Windows Insider preview about an hour or two ago so that's not the issue either.
So I think I've ruled out the OS, display driver, faulty GPU and PCIe lanes. Not really sure what comes next, bios? faulty mobo? cpu? Display? Display is still showing as generic but working fine..
 

gijoe50000

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No man. Pretty sure the card is broken. My other GTX 970 worked perfectly when I swapped them out, same brand and model. I even swapped them a few times more, just to be sure. I'd say it was something small, because the card ran perfectly otherwise.. just wouldn't take Nvidia drivers.