I believe there may be a bug in AIDA64, but only with the Sensor page and not the OSD.
I just checked both AIDA64 and RealTemp 3.60.
I noticed that Core #1 would jump (momentarily) up to 46° in the Sensor page, while it would remain at 38° on the OSD. Core #2 would jump (again, only momentarily) to 42° on the Sensor page while the OSD and RealTemp reported 33°.
The other two cores temperatures matched up (both Sensor page and OSD) between AIDA64 and RealTemp.
Personally, I would use the OSD, I never did like using the Sensor page.
I forgot to mention that the AIDA64 OSD and RealTemp agree across all cores.
Last edited by Arctucas; Dec 24, 2010 at 11:11 PM.