PC *sometimes* won't open

yassinas

Honorable
Aug 19, 2013
2
0
10,510
Built January 2012, specs:

Intel i7 3960X
2x GTX 590 (Quad-SLI)
ASUS Rampage IV Extreme
16 GB RAM DDR3 (4x4)
Corsair 1200W Gold ATX PSU
Watercooling with Swiftech MCP655B pump
Phobya G-Changer XTREME Nova 1080 Full Copper Radiator - 60mm
3x Dell U3011

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I've been having troubles for a few months with my build, about varying from once a week to once a month it sometimes refuses to boot for the whole day. It would switch between the computer not responding at all when I press start, or it would open for one second, close, open again, close repeatedly until i forced it off. It would stay like this till either the end of the day or the next day, then it would run normally until the next time. I tried reinstalling windows 8 (custom) and it still does the same. Any idea what can be causing this? My PC is also plugged into a power strip (standard, no surge protection) and there are some powercuts.