So today I went to shower and left my computer on, when I returned the computer was off. I tried to turn it back on and the lights flashed on, the fans jolted and then everything went off. There wasn't any beep or error message that popped up on the screen since the computer was barely on for 1/2 of a second. I originally thought it was my ram so i reseated it making sure there wasn't dust in the slots for it. I went through methodically looking for what could be wrong, eventually i took my graphics card out (980 ti hybrid) and tried to boot it and up, it started just fine. I thought it was strange and believed it to be my PSU although it is 800 watts it is quiet old (2-3 years). So I took my friends 970 and popped it into my computer and it booted up just fine. then I put my 980 ti into my friend's rig and his started doing what mine was doing (flashed on then off). I am really hesitant to buy a new GPU since my 980 ti performed perfectly all the way up until today. Is there anything I could have missed or a quick fix that I can try before going out and spending +800$ on a new card?