i got a rig which is C2D 6750 2.66GHz, Intel P35 Board, 2GB Ram, Gecube HD3850, ori Vista HOme, ori GOW, all drivers up to date running the game so far didn't encounter crash at all but the game is totally unplayable! my problem now is every 5 sec the fps will drop from 40++ to 1 - 5 fps, my brother's rig is AMD x2 4000, 2GB RAM, 1950PRO, XP SP2 ahem version, GOW ahem version run pretty smooth and get constant 30++ fps, i getting crazy bout this, i even set the graphic lower than my bro setting but the result getting more worst!
but i'm sure my card hd3850 perform is more better than x1950pro on every game i played, BTW i need to ask is there anyone having this problem too? i hope someone can help me solve the problem!

but i using ati CCC 7.10, no background or any 3rd party software running while i playing the game, and i turn off antivirus every time i play any games, i just don't get it, if i knew this happen better i buy jack sparrow version and would not leave a hole on my pocket, SOB SOB!