Houston, we have a successful Yonah 533->667 pin mod!
Just got my new Toshiba A135-S2386 (Intel T2080 1.73/533, ATI 200M chipset) pin modded to running at 2.16/667. First I tried isolating BSEL[1] to pull it HIGH the hard core way (breaking the pin off). In the old intel BX days this was how you pulled a CPU socket pin HIGH. When I did this nothing happened, still at 1.73/533. Since 667 requires BSEL 2:0 set to L-H-H the T2080 cpu is setting BSEL[0] to H. I did not think it would work, but since I had nothing to lose, and had already removed the BSEL[1] pin, it was a simple matter to jumper BSEL[0] to BSEL[1] using a wire bridge in the socket to give me the L-H-H. When I booted it up, BINGO, it worked like a champ. And the multiplier stayed at x13 thankfully so no problem with being locked at x6 on this chipset at least. I think the trick is that you must do BOTH: remove the BSEL[1] pin on the CPU to isolate it and use a wire bridge to jumper BSEL[0] and BSEL[1]. I do not think it will work if you only jumper the BSEL[0] and BSEL[1] as others have found, but I did not try that. Anyway good luck if you try it on your 533 yonahs. It should work on any of the new NAPA intel chipsets that support 667.
MaxFSB
