Supermicro X7DAE + Windows 7 = high DPC latency

I recently installed Windows 7 on a system with the Supermicro X7DAE motherboard. Once installed, anytime I tried to play any type of audio the sound would crackle. Initial google searches appeared to blame my Create XFI sound card. However, upon further testing using the Windows performance analysis tool, the motherboard seems to be at fault. The SMBus controller seemed to be saturating the bus for some reason. Once the device is disabled in device manager, DPC latency and audio return to normal.