well if you do it right, which he did, and with minimal volatage increases, which he did, and with the right cooling, which he has, then you can do that
when i started OCing my X2 i was stuck at 2.1 from 2.0 and with a lot of experimentatiion i found my problem and got to 2.5 easily. i can go to 3.0 with the right cooling
you are probably doing something wrong, like i very similarily did. set everything to stock, loosen RAM timings, lower RAM speed a little, stock voltage on all, then raise FSB as high as you can and then minimally raise voltage and repeat that etc.
when i started OCing my X2 i was stuck at 2.1 from 2.0 and with a lot of experimentatiion i found my problem and got to 2.5 easily. i can go to 3.0 with the right cooling
you are probably doing something wrong, like i very similarily did. set everything to stock, loosen RAM timings, lower RAM speed a little, stock voltage on all, then raise FSB as high as you can and then minimally raise voltage and repeat that etc.