UT freezing =(

I'm having problems with UT freezing recently on my PC. Sometimes it will load the whole level and freeze about a minute into it, sometimes it won't even finish loading the level. I've tried this in Direct3d and OpenGL with no difference either way (other than OpenGL definitely works better). Also this used to work flawlessly for hours and hours on end and I don't believe I've changed anything in my hardware configuration since I last played it successfully. A few days ago I got fed up with it and scandisked (with surface scan) several times, reinstalled Win98, DirectX, UT, and all of my drivers as well as downloading all of the latest UT updates with no luck. I'm beginning to think I might possibly have a bad DIMM but I'd like someone to review my conclusions just to check my conclusions.

System configuration:
Athlon 500
Asus K7M
WD Caviar 10.2
Guillemot GeForce 256 (the original one) w/ latest drivers
32 MB PNY PC-100 mem
128 MB PC-100 mem
Logitech Wingman Gaming mouse USB

HEEEEEEEEEEEEEEEEEEEEEEEEEEELP!!!!

No UT that sucks. I have tons of problems with UT but after a clean install everything always seems to Magically work again. I think you might want to post this in planetunreal's forum because they have a good board and good response times. I still can't pick up the quad without my whole system locking up. LOL