I tried 1.725, but it did not give me one mhz extra....
then I booted with 260fsb @ 1.7, and it crashed!
Damm I hate this.
I'm now running safe and stable @ 250fsb /1.675v core

(same as I did with the D1)
Well, I guess I'm gonne change CPU's again. Back to the D1.
Remove the IHS and see if that will help some in my new setup.