EDIT (topic title): Is my power supply bad?
I just finished building my first PC. I connected it to a monitor via VGA onto the motherboard and turned it on. Fans all turn on but there is no output on the screen. I triple check that all cables and are plugged in correctly and what not. I try again but this time without the GPU connected and it boots up fine. I can enter BIOS and install Windows. So now I am left to think that I have received a bad GPU.
I turn off the computer after Windows has installed and plug the GPU back in. Instead of connecting to the monitor through VGA (directly into the motherboard), I connect the graphics card via HDMI into my television instead of my monitor because it does not support HDMI. Now the computer boots up fine with the graphics and I can enter BIOS and boot up Windows. I reboot and change the settings in the BIOS so that the computer boots up straight to integrated graphics rather than the GPU (because I have yet to install drivers). I boot to Windows and everything is running fine. I use the computer for just over an hour and the screen just goes black. I can hear all the fans running but the screen displays no output. I restart the computer and all the fans turn on but nothing is being displayed.
I have tried many things including
1) reapplied thermal paste to cpu
2) reseated ram and even tried booting with only one stick as well as none
3)I have bought a one of those cheap PSU testers and checked it. it tested fine with all LED's lighting up and nothing wrong. I know this means that I am getting power but I can also be getting the wrong voltages, right?
4) i have replaced the motherboard (same model) and problem persists.
What could be the problem? Could it even be the CPU?
Any suggestions and help is appreciated. Thanks in advance!
Motherboard: MSI Z87-G43
PSU: Corsair CX Series 600 Watt (80 PLUS Bronze)
GPU: SAPPHIRE Radeon HD 7950 3GB (100352-3L)
Processor: Intel Core i5 4670K
Memory: Corsair Vengeance Blue 2x4GB 1600MHz
Edited by TheBeezKneez, 25 September 2013 - 11:19 PM.