I have a very similar setup to you
GA-965P-DS3 rev 3.3
e4300
7900 GS KO
but with 2x 1024MB Patriot PC6400 RAM.
I am running F10 bios and have no issues reaching 3+ GHz
It defineately sounds like a bios setting.
Maybe something on one of the other pages other than the MIT one.
If...