Originally Posted by
cptwhite_uk
I think Memtest needs to be run also. If you're unsure as to the the proceedure just ask and someone can provide a step-by-step guide. It's not that hard.
I also think it's worth building the PC outside of the case. Using a nice piece of firm cardbox (like the case's box - that'd do nicely) to support it.
If memtest shows no errors, and you're still getting freezes outside of the case I'd suggest trying a cheap replacement graphics card (for testing) as this is another potential cause. It's highly unlikely to be the processor or PSU (given it's a quality PSU). The motherboard is the last option but you should try and confirm the errors still happen with different RAM (proves yours is ok), a different graphics card (to prove yours is ok) and building outside of the case (to prove a short in the electrics isn't the cause).
Method:
1) RUN MEMTEST NOW!!!!!!!!!!
2) If ok, build PC outside of the case...If memtest gives an error, run the RAM in your mates PC to reproduce it there too, if you still get an error - return the RAM for replacement
3) If you have i) no RAM error, ii) still have error with PC build outside of the case, then try a cheap graphics card. If the replacment graphics card makes the system stable, try the graphics card in your mates PC to reproduce the error there. If it moves with the graphics card, RMA the graphics card....
It's just logical deduction really...