im having the same problem after using amd fusion, i get stuck with a x 4 multiplier on ma phenomII 955 resulting in 800mhz x4 i have c1e and c&q disabled, the fact is my bios settings are being completely ignored, ive tried altering my power management options, also to no avail.
the only way i get my 3.2 back is through amd overdrive, i cannot effect any changes to my cpu via my bios, so it seems.
i had my own post on the subject i also have the M4A79 deluxe with bios3501
i have win 7 64bit. did u find a solution nini?