Listen to Shadow703793 it's an unavailable sensor. Just because the later BIOS is reporting a higher temperature doesn't mean that the temp actually went up. It didn't.
What would you recommend about OCing this rig?
I'd like to start tonight, but I'm afraid I could damage something without knowing the proper temps.
Well you never gave me any information about what "this rig" is. I would start with these stickies. You probably should take tonight to read them, as they can get involved, and OC tomorrow night.
Ever since I upgraded to BIOS 0603 I've been getting crazy temps.
CPU went up 10C at idle.
Does anyone know how to downgrade to a previous BIOS.
The current EX Flash BIOS utility won't let me downgrade.
Thanks.
When I upgraded from BIOS 0302 to 0504 on my P5K Premium a month ago the CPU temp shown on ASUS probe also went up some 10Cº. But I still have the same CPU temp as shown on CoreTemp.