@D A M
What bios are you using? I think that 265 fsb thing you are getting is a bug which only occurs on netburst cpus. Do you have a netburst cpu? (P4/PD?)
I got it to run 1:1 by using bios 716. 716 (in my opinion) is better than the others. Pretty stable and does good OCs. 7.3 is also decent.
I've got an E6400. My BIOS version is the latest revision (can't remember the # off the top of my head).