PC locks up when loading large zones

[Rajahten Summercry]

I am not sure if I posted this before, as I just came back after a 7 month break.

My problem is this - when I load into large zones.. i think specifically, outdoor ones, my entire PC crashes. I hear a "bzzt" from the speakers really quickly, then i have to hit the reset button.

This has happened ever since I used the emulator.

Does anyone have any ideas? I think it may be a RAM leak or something..

Anyway, I run an Nvidia 7800 GT, AMD 3800+ Dual Core (with dual core optimizer installed), 3 gigs of ram.

Thanks!