I can run c2d at 10ghz with one of these.

I'm guessing the memory isn't fully compatible, updating the bios might fix it, or exchanging the ram for a different brand, it could be something else tho, maybe check the jumpers on the hard drives & dvd drives (but that wouldn't really relate to the bios problem)

I wouldn't worry too much about flashing the bios ive probably done it 100 times, no problems, but i do know a guy who ruined his board that way so i dont know.

try clicking on the speaker in sytem tray, go to options/properties, check off micro phone, and see if its muted

Edit: oh wait thats how to do it in xp,sorry, maybe vista is similar?

I upgraded from a mildly overclocked 6600TD to a 7600GS, there was about a 5fps difference.

then from a 7600GS to a 8600GT and it was about 3 times as fast. my fear fps went from 30fps to 90fps.

http://www.newegg.com/Product/Product.aspx?Item=N82E16814127286