I have noticed an odd behaviour when my SP3 (I5, 256) is docked. Task Manager reports System consuming ~ 13% and System Interrupts consuming ~ 8% of CPU resources while idol. MS has replaced my dock once and I'm on my second SP3 now and the issue seems to be remaining. CPU load doesn't fall below ~ 21% while docked but will drop to 0% when not docked. It doesn't seem to matter if the dock has any peripherals attached or only just the power adapter. Docked CPU Usage Un-docked CPU load Has anyone else come across this? Any ideas? Obviously this becomes an issue when I'm taxing the SP while docked because it is already at 21% and program loads cause the unit to get hot, increase fan use/noise and cause CPU throttling.