AnsweredAssumed Answered

7990 black screen issue.

Question asked by divenity on Jun 8, 2016
Latest reply on Oct 6, 2016 by maxhardy

GPU: Powercolor 7990

CPU: i7 4770k

Motherboard: Asus Z87a

RAM: 16GB Corsair Vengeance 1600mhz

PSU: Cooler Master Silent Pro Gold 800W

Operating System & Version: WIndows 10

GPU Drivers: Latest Crimson driver, 16.6.1


A couple of days ago my PC started having black screen crashing issues, it would get a few seconds into the desktop and then blackscreen, after several reboots to the same issue I assumed it was a driver problem, rebooted into safemode (in which the PC ran perfectly fine) and removed the drivers with DDU. After rebooting normally the PC ran fine with no drivers installed, I left it alone for a good 20 min to make sure, and then proceeded to reinstall Crimson, at the point which the display normally flashes black for a couple seconds, it stayed black for 10 minutes before I was forced to hard power down the system and tried again.


I installed teamviewer and tried again, hoping I could get through the install through teamviewer, but as it turns out the black screen was a hard freeze, and teamviewer lost connection. I then proceeded to grab a clone of my HDD from a few months ago where everything was working perfectly, same issue. After going back to my primary drive I proceeded to attempt installing every single windows 10 driver that has been released, they all caused a black screen lockup at the same point...


I installed a different GPU, an r9 285, and the computer started working flawlessly, drivers installed without issue.


Things I have tried since then to get the 7990 working:

-Updated Motherboard Bios

-Flashing factory VBios to the card (both GPUs, I didn't forget that part).
-Using secondary Vbios set on the card (has switch on back)

-letting windows update install the driver (win update is set to never install anything without my permission, so I know there wasn't some conflict there).

-Disabling windows driver signature enforcement before driver install.

-Checking for anything in win update, everything is up to date.
-reinstalling .net Framework/visual C++
-attempted driver install with monitor plugged each different output on the card (2xDP, 2xDVI, 1 HDMI) one at a time, to check to make sure the output I had been using didn't just suddenly stop working.
-The card has been in and out of the PC several times, so re-seating the card in the PCI-E slot has been confirmed not to fix it.
-Attempted installing into another PCI-E slot, same issue.

-Using CCleaner to get rid of leftover registry entries between cleaning with DDU and installing new drivers.
-Ran malware/virus scans, completely clean.



I haven't put the card in another PC because I don't have one to put it in.

I have checked the power output on my PSU, it's functioning normally.

I'm flat out of ideas, what I really want to know is what could cause a card to work perfectly fine up until the point where the drivers are installed, and then completely cease to function? That is the part that makes absolutely no sense to me. At this point I am about 99.9% convinced that this GPU is dead/dying.