Looks to me like your mobo can't support 125w CPUs. Some AM2+ can't support more than the 95w CPUs, this isn't too uncommon. You'll be stuck with the 95w ones, and that is the Phenom II 945 at most. Its pretty much the same CPU anyways (minus the unlocked multi and stock clock). No performance difference when they're clocked the same, and they have the same OC headroom (if the mobo can keep up with the 945).