Xbit have compared six KT400A motherboards for your Athlon or Duron. They also looked at two onboard sound solutions. The first is formed by a VIA VT8235 South Bridge and an AC’97 VIA VT1616 codec, and the second one is based on nForce2 MCP-T with the integrated APU SoundStorm and an AC’97 Realtek ALC650 codec.