Can phenom ii x3 8450 unlock to phenom ii x4?

Some of them can. IMO it isn't worth rolling the dice at this point. The price difference between a phenom II x3 and an x4 (like the 955 BE) is small. It's even smaller if you get an Athlon II x4.
 
yes maybe you're right but i already had this phenom ii x3 8450, and i just want to unlock it to phenom ii x4, can u give some advise, pls?