sorry to clutter up this thread with questions - feel free to move over to a new thread or more appropriate place.

Can you guys answer for me - why do my non-hyperthreadding CPUs seem to peg at 100% and sit while the hyperthreadding CPUs just bounce around like crazy from 10% to 99% on task manager?

Thx.

dual x5450 box:



dual w5580 box:



EDIT:
I am running ONLY WCG/BOINC on the x5450 box and running a few other applications on the x5580 box if it matters. When I run other apps on the x5450 box it still stays steady though.