Basically here's the backstory. My computer was built in May. I have not had a single issue with it. Today I went away for about 5 minutes and came back and my monitor was in standby, something that happens normally in Windows when you go away. I moved the mouse, and signal came back! However, it once again went away after about 5 seconds. I am able to get a signal on my monitor for about 5 seconds everytime I turn it off/on. I have tried 3 monitors and 2 different cables, it happens on all of them. Using onboard video this does NOT happen and it does not happen on other computers. I have no idea why this is happening. I have tried everything I can but the monitor simply refuses to stay on for more then 5 seconds. It DOES happen during POST, I loose signal about 5 seconds into post. The computer is still working 100% fine. I can run games, etc just fine but my monitor keeps turning off every 5 seconds. I am litteraly tapping the power button as I write this post. Overheating / Temps is NOT an issue. It's running cool, fans are good, and I have never had the card go visibly above 70c. My Graphics card is a EVGA GTX 560 TI My Power Supply is an ANTEC 750w PSU So what do you think? Is this a PSU or GPU issue? Solutions I've tried: Remounting every part in my computer Diffrent Monitors Diffrent Cables I cannot test another PSU or GPU as I do not own anymore. What I did notice and find very strange is, If I use my 800x600 very old monitor, after turning it off and on about 100 times, it will continue to hold a steady signal until I reboot - then issues arrise. I cannot get my 1080p monitor to hold a steady signal no matter what I do. I have never experienced anything like this before so I hope someone can help. Thank you.