Help, so wierd

My system won't post at anything but 1333Mhz FSB, won't post at 1332, won't post at 1334.

Gigabyte X48T-DQ6 : http://www.gigabyte.com/products/p [...] id=2765#ov
Mine is Rev 1.0 though

Intel Core2 Duo E8400

Corsair Dominator DHX DDR3 1600 Mhz.

It's making me nuts, coz I know I should easily do 3.6Ghz/1600FSB with this. But it won't post at anything but 1333 FSB. Won't post at 1066, not at 1332 and not at 1600.

Does anybody have any idea why it won't?

Nobody?

No it use something called M.I.T (motherboard inteligent tweeking).
Its like the cpu is locked on Bus, not multiplier. But it's not supposed to be.
It will post at 9x333, 8x333, 7x333, 6x333 , but it won't post at even 6x266.

Anyway I gave up, and ordered a new MB,RAM and I5 2500K instead of waste more time on this.