OK... never seen it readout such extremes on that sensor before. And not sure if it's part of CPU, GPU or something else. None of the other temperatures match to it. Can't imagine anything is wrong since I just did fresh install of Windows XP. But the other day after some updates installed it asked for reboot, when system rebooted it froze up on the POST screen with half the screen not displayed. Cleaned up all the components and tested RAM with Memtest86+ and no errors. HDD tested fine, as well did everything else. Seems that re-seating GPU and RAM fixed the problem.
Used to have this CPU in there, but vcore kept dropping to 1.02v and the machine would power off.
Mobo was designed for Northwood core CPUs, but the BIOS has been flashed to allow for Prescott core. Though, I also have been told this board supports up to 3.2GHz CPU at most. Now with the 2.8GHz Northwood core CPU in use the vcore is at 1.45v like it should be. Maybe could benefit from a slight overclock, but I've never done that before and not sure how.
As for the Prescott... well I'm trying to get it set up on another board that was designed to run it. Otherwise, guess I'll just sell it on eBay or maybe donate to someone who could use it.