Hi. I recently got an LGA 775 desktop on eBay, and it arrived in significantly worse condition than I thought. I have added my own GPU, sound card, and storage, but it's still pretty unstable under load (Doom 3 and Painkiller crash constantly). In addition to replacing the broken optical drive, I am thinking of also getting a semi-modular power supply as that would greatly reduce case clutter (and because the generic PSU that's currently in it has me a bit paranoid). Is there anything specific I need to look out for when getting a new PSU for the LGA 775 platform? Thanks.