I accidentally undervolted to 800mv...

[Simon Brezhnev]

I was playing around in afterburner and I accidentally set my GPU core voltage to 800mv and applied the settings. For a moment everything was fine, then I clicked on another tab in afterburner and my screen turned red and the system hanged. Upon reboot, I got to the window user screen. After logging in however, my screen turns blue and my system hangs (Not a BSOD). After post my motherboard informs me that a Hyper Transport Sync Flood Error Occurred.

I can't get into windows without disabling my HD 6950 in device manager. I've tried to fix it to no avail (uninstalled afterburner and drivers, reinstalled drivers). Does anyone have any suggestions as to how I can solve this issue?

[techie]

while I do some quick reading into this, is there a way to reset the gpu (reset button or dual bios switch)

I'm not familiar with such occurrences myself so someone else will have to fill me in here, but is it possible that this may have caused some damage to the card?

[killerx525]

The card should have dual bios switch somewhere.

[Simon Brezhnev]

The card should have dual bios switch somewhere.

I don't think mine does. It's the XFX HD-695X-ZNFC.

[King Nothing]

Have you tried using booting into safe mode and then reset the volts?

[Simon Brezhnev]

Have you tried using booting into safe mode and then reset the volts?

Yes, all the afterburner settings were greyed out and inaccessible in safe mode.

[mvitkun]

King Nothing is right,although if you boot into safe mode the driver won't load, you might not be able to open afterburner,so simply uninstall afterburner if this happens.

[killerx525]

The card should have dual bios switch somewhere.

It does, near the crossfire connectors.

[Simon Brezhnev]

King Nothing is right,although if you boot into safe mode the driver won't load, you might not be able to open afterburner,so simply uninstall afterburner if this happens.

I've uninstalled afterburner and CCC and everything driver or video related. The next boot after windows auto-installs the display drivers results in a hang.

[killerx525]

The last post screwed up and there was meant to be a photo.

[mvitkun]

King Nothing is right,although if you boot into safe mode the driver won't load, you might not be able to open afterburner,so simply uninstall afterburner if this happens.

try taking the graphics card out and putting it into a different pcie slot.

[Simon Brezhnev]

The last post screwed up and there was meant to be a photo.

I opened up my case and there is no dual bios switch. The traces are all there but the soldering points where the switch is supposed to go is empty.

[Simon Brezhnev]

King Nothing is right,although if you boot into safe mode the driver won't load, you might not be able to open afterburner,so simply uninstall afterburner if this happens.

I only have one pci-e slot.

[Simon Brezhnev]

Windows fixed it somehow. This thread can be closed.

[killerx525]

The last post screwed up and there was meant to be a photo.

How odd, could please take a photo of the crossfire connector area?

[Ghost]

The last post screwed up and there was meant to be a photo.

XFX cards have this blanked out bios switch on some card.

[christoi]

The last post screwed up and there was meant to be a photo.

To add to this, I'm pretty sure many manufacturers took out that option with the later batches of HD6950's, because people were flashing it to a HD6970. As silly as it is, the card probably doesn't have a dual-bios switch.