I'm not sure is this even a problem but I'm worried what might happen 'long-term'. Every time I turn on my PC it starts running for a second or two then it shuts down (before any screen appears). It stays shut for about 2-3 seconds then starts running and boots into windows.
Recently I have upgraded my PC (new graphics card, overclocked CPU, new heatsink, more RAM) and I'm not sure when I started experiencing this problem but it was definitely during or after the process of upgrading.
Other than that my PC runs normally. I stress tested everything and it works. I'm pretty sure its not my PSU because I play Battlefield 3 on ultra settings without crashes or anything.
What might be the problem? If anybody has any suggestions I would be grateful.
OS: Windows 7 64 bit
Chassis: Asus Vento A8 (with two 80mm fans)
Motherboard: Asus P5E
Graphics Card: XFX 6870
Processor: Core 2 Quad Q6600 2.4GHz (Overclocked to 3.0 GHz, 1.23750 V)
Aftermarket Cooler: AC Freezer 13 (Arctic Silver 5)
Memory: 6 GB (667 MHz)
PSU: Asus model A-55GA (550W)
Back-UPS CS 500 (APC)
I had some problems with temps after OC-ing so I had to drill a few holes at the front side of my PC to get better airflow. My temps are fine now but I made a few holes pretty close to power button (Goes without saying that I haven't touched any of the wires that go to button)
Thanks for replies.
I will try using default settings and see what happens. One more question, in case this problem is caused by overclocking what should I do? If theres no chance of long term damage I can just leave it be?