Any of you guys have the same board?

I've been OC'ing my e5200 but i feel that the lack of fine tuning of the memory ratio is holding me back .. . (the only options are 2.66, 3.xx and 4.0)
Is there a mod for the bios that can be used?
I've read somewhere that there are mods for the CPU but i really don't feel comfortable screwing around with the chip itself. . .