I have a brand new Pentium 4 Northwood (2.4ghz, HT enabled)
When I turn it on for the very first time (After a CMOS reset) it reads:
"CMOS checksum error - Defaults loaded
Warning! CPU has been changed.
Please re-enter CPU settings in the CMOS setup and remember to save before quit!"
http://www.ecsusa.com/products/648fx.html
that's my MB