I don't think it's too off topic. Onboard sound is a feature of the motherboard. As for how the kk266 handles being overclocked, my 1000Mhz Tbird is at 1200Mhz (150x8.0 cas2)with pretty much no effort and using a $70 stick of generic pc133 (256mb) ram. Not too bad, but I really haven't had too much time to mess with it.