Can you install the GPU in another unit to test out?
I've tried putting the GPU inside another PC, different motherboard, everything... The same thing happens, as soon as the AMD driver get's installed the GPU goes nuts. Although using VGA still works. Same thing happens on Windows 7 and 10. It's not the OS, although I did notice one of the GPU's fans not turning properly and not at the right speed either. Could it be, that the broken fan is not cooling the GPU enough, so when the drivers get installed it overheats? Any ideas?
It's the Microsofts VGA Display driver that's usually installed before the AMD drivers.
GPU: Sapphire R9270 2GB DDR5
PC: Desktop Computer
OS: Windows 7 Enterprise 64-bit
Driver Version: Currently none (Used 16.2)
Display Devices: 1. SAMSUNG LED SA350 FullHD Res 1920*1080
2. HP Pavilion 23xi Res 1920*1080
Motherboard: ASUS P8H61MLE - mini motherboard/intel socket
CPU: Core i5 3570 3,40 GHz
PSU: Blackberry 570W (Doesn't say which model exactly)
RAM: Kingston HyperX Blue 4 GB DDR3
Kingston HyperX Blue 4 GB DDR3
GPU fault when installing AMD Drivers, as soon as they're installed screen goes full black after Windows Start Up. Tried all of the methods in the 1st post.
Looks like you have debugged as much as possible here.
The last stage I would do is try and borrow and old graphics card from a friend if possible and install in the unit just to rule out other components.
If the borrowed GPU works fine, well, your GPU is fried.