X58 Base Clock only adjustable with Dip Switch

First some info about the hardware:

MSI X58 Platinum (MS-7522), Bios v 3.9
Intel i7 920 (Bloomfield)
3 x 4GB DDR3 Corsair CMZ12GX3M3A1600C9

I can change and save the base clock in the BIOS, but on booting the clock changes back to the setting
of the di...