All the parts are about 6 years old, except the RAM which is only a few months.
Windows 7 64bit
Sapphire Radeon 7950 HD 3GB
Corsair HX 1050
Intel i7 3770
2x HyperX Fury 8GB RAM
About two weeks ago my computer started making a whirring noise, and yesterday it started crashing when playing games. It did not crash into a BSOD but rather a solid coloured screen (blue, black, pink, brown etc) made up of thin vertical lines, the sound would keep running for a few seconds and then stutter in a tiny repeating loop. At this point I had to hard reset the computer to turn it off.
I tried running different programs, browsing casually and watching videos went fine, but depending on what game I tried it would freeze up after 2-30 min.
Now it simply wont start anymore, the computer itself boots, the fans start running and it makes a single beep (which it usually does when the bios password pops up), but my monitor detects no signal. My motherboard has power-on self test LEDs, which indicate that my GPU is the problem. However if I remove the GPU and plug an hdmi cable into the integrated motherboard graphics I still don´t get any signal on my monitor, and in this case the POST lights indicate that the CPU is the problem.
Only one of the fans on my GPU seems to be running, and it starts making strange sounds when under pressure, but now I´m not certain if the GPU or the motherboard itself is failing, I assume that since the computer boots the problem does not lie with the CPU.
Assuming I´m even able to get the computer running one more time, is there any way to pinpoint what part of my hardware is failing?
What I´ve already tried:
Made sure my monitor works.
Installed the latest drivers for my GPU.
Checked temperatures, on the last two crashes my GPU was at 60 and 30 celsius respectively.
Reseating the GPU.
Cleaning out my computer and blowing out all dust, did this a few days before the crashing started.