Using the Biostar TA785G 128M, I can unlock the AMD Phenom II x2 550 to enable the 3rd or/and 4th core on the processor.
With the 3rd or 4th core unlocked, you get a phenom ii x3/x4
+ a little bit of overclock you are about to get a processor that is almost as good as the phenom ii x4! best performance for the value!