Here are our answers to your issues:
1. Test a different mouse and different USB ports to narrow the issue.
2. The temperature reported in the BIOS will be always reported higher than the one reported at Operating System level. This is because the motherboard BIOS will force the processor to do more calculations than the Operating System will do.
3. Intel motherboards are not supposed to have loose parts since they are soldered, we recommend checking your warranty options to replace the board.
thanks for your reply
to 1. This is a minor issue that happens only very rare and can actually be neglected.
to 2. This I don' t understand. How would BIOS cause the CPU to work harder while all it does is to display some readings?
to 3. An exchange is currently in process but I suspect a whole batch being affected:
Batch#: CNBT28V00H / Date of manufacture: 03SEP2012
Issue 2: Unless the BIOS uses a different set of operating instructions for the recognized CPUs the efficiency should be the same for continuous real-time calculations. My belief is that the power management is not functional when in the BIOS and the temperature will typically drift upward with time. Ports that would normally be selectively disabled are all fully powered when in the BIOS, for example. Unless the temperatures exceed the safe levels there should be no problem.