i need to try F2 (F3), because all bioses since F4 gave me a FSB wall at exactly 467mhz + the 1:2 (4.00) divider dont works with a fsb of 450mhz so i cant fully utilize my cellshocks right now :x

Its either the cpu (qx9650) or the board itself, but i have to try f2 first befor i can finally say its the cpu.