Help! Computer locks up!

Inzigna

Hey guys. So I've lately been having problems with my two year old desktop PC. It would randomly lock up and not respond at all (even my Razer keyboard and mouse would cease to light up), I've tried all sorts of things including resetting to factory image but short of manually reformatting the system. Running system scans show no problems hardware wise. Anyone have any ideas as to what could cause problems such as this and any solutions?

tardcore

Install any hardware recently? How are the GPU and CPU temps?

Inzigna

The only major thing I can think of are my keyboard and mouse, the problems started after using them. They are respectively the Razer Blackwidow Ultimate (keyboard) and the Razer Imperator (mouse).

Using Piriform Speccy, but CPU temp is stable at 50C, Motherboard at 36C, HDD at 31C, I can't seem to get a temperature reading for my GPU.

These are my system specs for reference:

Operating System
MS Windows 7 Home Premium 64-bit
CPU
Intel Core i7 920 @ 2.67GHz
Bloomfield 45nm Technology
RAM
6.00 GB Triple-Channel DDR3 @ 531MHz (7-7-7-20)
Motherboard
DELL Inc. 0X501H (CPU 1)
Graphics
NVIDIA GeForce GTX 260
Hard Drives
977GB SAMSUNG SAMSUNG HD103UJ (SATA)
Optical Drives
TSSTcorp DVD+-RW TS-H653G
Audio
Realtek High Definition Audio

Any help would be much much appreciated.

Inzigna

I'm beginning to suspect that it's my PSU, is there anyway to check it via software?

TychoCelchuuu

Not really.

lapinoken

Honestly, I had the same problem with my old computer.
After I figured out I fried a part of my southbridge who handles slow(!?) devices (http://en.wikipedia.org/wiki/Southbridge_(computing))
and replaced my motherboard I could game/work once more :-)

--Edit--
By the way, hardware issues most likely won't show up when you do a scan because all works fine when you do the actual scanning

Inzigna

It took a whole load of figuring out, but I thought I'd put my solution up for anyone who is struggling for similar issues. Turns out it was my motherboard (like lapinoken) that was giving me problems and promptly replacing it got everything in order. Thanks for everyone who chipped in!