I see your point.
Sound stuttering never occurred to me. I can imagine that happening with onboard graphics and sound, but hardly with a dedicated AGP card and a PCI sound card with their own graphics and sound processing unit that discharges the main CPU a great deal. I'm running a 8500LE and a SBLive! with a Katmai 600Mhz on a BX platform and never got any sound problem whatsoever, even with intensive games and/or apps.
I believe sound would have a minimal impact on frame rates.
With hyperthreading, the problem would, in theory, be solved.
<font color=red>That was my two cents!</font color=red>
<font color=blue>Now I'm broke!</font color=blue>