I was having problems before the patch, but managed to figure them out... I did just about everything possible to my machine:
flashed the bios, changed all the services settings, downloaded some apps for spyware elimination, turned off HD indexing, turned off Norton protected trash bin, got a memory optimizer app, got that powerstrip app from agent-commando's thread(thanks!), installed a soundcard(did have onboard sound), and that's just what I can remember...
Thanks to Buliwyf and Agent and everyone else who contributed an idea
It runs like a dream now... even after the 1.4 patch... I have all settings cranked and very few problems... don't know what the framerates are, but the only time I have any problems seems to be when everyone else is getting them too (server side, I guess)...
You should come on over and check it out