So I upgraded my GPU to the HIS 7770 ghz edition about a week ago. Everything was working fine until today, when I was playing Guild Wars 2 and the screen suddenly went black and said "no signal".
I tried turning it back on, and the screen still said "no signal". The monitor seemed to be working fine. I thought that my display driver had crashed because with a quick glance to my tower it seemed to be still on as the front fan was still spinning. So I just turned off my computer and restarted it, and everything seemed to be in order again; but this happened about three times today.
On the third monitor-no signal-blackout, after I pressed the power button, I wasn't greeted by windows 8's familiar login screen but instead by that blasted "No signal"!
I checked to see if my computer was indeed on but I soon realized that only the front fan was!
So I turned off my comp and monitor, unplugged everything, opened the case and checked inside to see what was going on. I double checked to see if everything was plugged in correctly, if my power supply worked and just pushed on the cables a bit to make sure they were in.
Then I plugged everything back in, but I didn't put the tower sliding panel back on in case the crash happened again. I then proceeded to turning the computer on and...presto! Everything seemed to be working fine and I could log in to windows 8 again.
I am typing this now with my opened computer next to me.
So my question is, what the hell happened? Why did 90% of my computer's components randomly stop working and why is it now working again?
P.S: I forgot to mention that a couple of days ago I installed the AMD CATALYST 12.11 graphics card driver, so I thought it had something to do with my graphics driver crashing. But I don't think it was my graphics card crashing since like I said, most of the components of my computer stopped working but my PSU kept powering the front fan.
Intel Core i5-3450 Ivy Bridge / 3.1GHz (Max 3.5GHz) (3rd Generation)
8GB SDRAM DDR3
Hard Drive : 1TB - SATA III - 7200 rpm
HIS 7770 Ghz Edition GDDR5
MOBO Intel B75 Express Chipset
PSU Cooler Master eXtreme Power Plus 500w Power Supply
Monitor Acer S201HL bd 20-Inch Widescreen Ultra-Slim LED Display
If I recall correctly (80% sure) my system's only crashed on the games I've played today such as Chivalry Medieval Warfare, Crysis 2, and Guildwars 2.