Yeah, I ended up reading from that point onwards. It's been pretty much standard behaviour for most of the 775/1366 boards I've owned with varying volumes. My P5B did it, along with an AsRock, and about 6 different P45 boards. The powersaving features cause the inductor coils to whine which I'm sure a lot of us have been familiar with in the past. The Gigabyte P45 boards seemed to have the least noise, but my UD3R makes the worst I've heard since the asRock! During Idle, and with nothing open I get very low noise, while playing a BD-R / avi it screeches away and under full load it's virtually silent again. This is of course with EIST & C1E enabled which cause the vcore to vary and inductors to whine.

So I'm assuming the 229 bclk was a UD7 bios flashed to the UD3R?