-k64 was indeed clearly stated ==> but it's not listed in the models shown on the IBM documentation page I listed, so it wasn't clear WHICH of the Northwoods are supported. Did you find another document that includes the k64? [The only other one I found simply noted the original 2.4GHz CPU: http://www-307.ibm.com/pc/support/site.wss/MIGR-42671.html, and the service manual (http://download.lenovo.com/ibmdl/pub/pc/pccbbs/netvista_pdf/24p2969.pdf ) lists the same model #s as I listed above for support with the various speed CPUs.]

PCBONEZ

It's an i845G Chipset.
The i845 variation with the 'G' designator supported 400/533 FSB from day one.

PCBONEZ

Also note: If you look at your link here....
http://www-307.ibm.com/pc/support/site.wss/MIGR-42671.html
.... A number of the configurations show the 3.06 GHz used as original.

Gary Case

Yes, I know. But that doesn't mean they included BIOS support for the faster chips -- I suspect that's why they have the list. In fact, the release notes for the latest BIOS download for this model (v24KT55A) note that they increased the max CPU speed from 2533MHz to 2800MHz ... so it's not clear just when they added support for the 3.06GHz CPU's (although the list I posted earlier clearly indicates they did).

solunatec ==> What BIOS version does your system have??

PCBONEZ

>> A number of the configurations show the 3.06 GHz used as original. <<
Obviously they have a BIOS for 3.06GHz.
So, update to the latest BIOS -> Covered...
Whew! - That was Close!

PCBONEZ

The page showing 3.06 GHz used --> Last modified: 2004-09-28
v24KT55A --> Release Date: 2005-05-08

- It's okay.