cancel
Showing results for 
Search instead for 
Did you mean: 

Graphics

rageraiden
Journeyman III

Activated AHCI led to my GPU not working

Something quite bizarre happened when I tried to activate the AHCI option in the BIOS. I had first tried with windows 7 already installed by changing a value in the registry. At first, everything seemed fine with a noticeable speed bump but within a few minutes, the computer rebooted. Then the monitor kept going on and off before the computer shut down.

Nothing seemed to work, even changing back the registry (through the command line interface) & the setting in the BIOS. In safe mode the computer booted just fine, so it did when the monitor was plugged on the motherboard.

In the end, I reinstalled windows 7 thinking I had messed up. This time I activated AHCI prior to installing the operating system. Everything was fine and dandy until I installed the latest GPU driver. The computer rebooted, then the monitor kept going on and off before the computer shut down. Still, it boots just fine in safe mode or when plugged on the motherboard.

I consider reinstalling windows 7 with the IDE setting but I could do without. I do not have another system to test the GPU (not yet atleast). Any idea? I am confused but I felt it was the correct forum to come to.

Thanks for your help.

PS: I already had the latest drivers when the problem occured. And now even after completely uninstalling/erasing anything related to the GPU drivers (registry, folders....) the computer will not get past the windows logo (screen LED going on & off until it shuts down) unless it is in safe mode. That is why I thought it was not an issue related to the GPU drivers. Because getting rid of them should, then, have solved the problem. I thought the BIOS was corrupted, but then why would it work in safe mode.

GPU: Sapphire radeon HD 7950

MB: MSI H61M-P31 (G3)

PSU: Corsair VS550

0 Kudos
3 Replies
john007
Exemplar

Re: Activated AHCI led to my GPU not working

Hello,

Maybe try the 'Windows startup repair' on boot it may fix the issue.

Some more info here. Or reformat the unit with an old HD?

Windows won't start up, startup repair can't fix it [Solved] - System Restore - Windows 7

0 Kudos
rageraiden
Journeyman III

Re: Activated AHCI led to my GPU not working

Well apparently the fact everything went to s**t was pure chance. I reinstalled with IDE settings & still the same issue when I try to install the drivers, which fail miserably. I will try to flash the bios later.

0 Kudos
rageraiden
Journeyman III

Re: Activated AHCI led to my GPU not working

Flash the 1st bios with the 2nd bios (dual bios gpu), because it is way too hard to find the correct bios due to the naming scheme of Sapphire (35 different radeon HD 7950... really Sapphire). Then I installed the driver (not the latest, one from December 2015) and it did not reboot properly. And this time, since I used the same bios as the 2nd bios i could not just switch between the two to log in. So back to plugging the VGA port on the motherboard. HOWEVER after using the latest version of

Display Driver Uninstaller I was able to boot on the graphics card.

Atleast I know the problem was not a corrupted bios BUT Amd drivers (regardless of which one) seems to interact badly with something. My guess, either the motherboard BIOS or the PSU.

More testing required.... F****** week.

0 Kudos