Been having a few problem of late with my UD3P board (v1.1) running Win7 x64 with periodic but random freezes that would last about 1-2 mins before bursting back in to life. Really annoying and tried lots of things, but it seemed to happen at times when the hard drives were especially busy. Anyway, I installed the latest JMicron SATA drivers (later versions than the ones on the Gigabyte site) and the problem has gone away.

Noted following fix in the release notes "Windows will freeze when device remains busy abnormally (by LeCroy Infusion and a hammer)."
hey flint did you notice any performance gains , a lot of us here like to use that controller for performance data drives especially like mr andressergio running three spinpoints in a raid setup