Hi, recently my custom PC has been freezing at random times. The screen freezes as if a screenshot was taken and it just sits there until I hit the reset button. When I press the reset button it takes about 10 seconds to actually reset. This freezing happens any time from 40 minutes to 27 hours (usually less than an hour or two though) after boot. However, I have run for almost 40 hours in safe mode so it seems to work in safe mode. This happens when it's sitting at idle, not doing anything at all. I also ran a three instances of Memtest at once for a coverage of 1600% each with no errors whatsoever so it doesn't seem to be RAM. Any ideas? Do you think it's power? I know my PSU is sort of old and crappy but I want to try whatever else I can before I go and buy a new one. I know I ought to buy a new one anyways but I also want to know if possibly (but hopefully not) anything else is broken. If so, I might just hold off on replacing things for now. Anyways thanks in advance for any help.
Specs:
-Intel i5-3570k @ stock
-Sapphire AMD Radeon 7850 @ 1050/1450MHz
-Asus P8Z77-V Motherboard
-8gb Mushkin RAM
-460w Cooler Master PSU
-120gb ADATA SSD (boot)
-1tb Seagate HDD (storage)
-Windows 7 Ultimate
Specs:
-Intel i5-3570k @ stock
-Sapphire AMD Radeon 7850 @ 1050/1450MHz
-Asus P8Z77-V Motherboard
-8gb Mushkin RAM
-460w Cooler Master PSU
-120gb ADATA SSD (boot)
-1tb Seagate HDD (storage)
-Windows 7 Ultimate