AthlonOC have posted a review of the Soyo SY-K7V Dragon motherboard. Heres a bit:
"CPU utilization using Winamp and the onboard sound never went over 6% and 4% would be the average. That was with a 1.33 Ghz Athlon. That really isn't a bad number at all. While using things like AC97 audio it is common to see the CPU usage go between 10 and 15% CPU usage. In gaming type situations you don't want a sound card using up alot of your CPU. This chipset does an adequate job of keeping CPU usage down."