AMD is always adding new chips to their lineup to fill any gap that you can imagine. Today we have the Phenom II X2 555. This chip comes clocked slightly higher than its younger brother, the 550. This stock clock will show some improvement, but who runs a Black Edition CPU at its rated speed? The whole reason for buying this chip is its unlocked multiplier for overclocking. The Phenom II also provides the L3 cache that the Athlon II lineup lacks, adding some additional performance. Since the start of the Phenom II manufacturing AMD has been getting better at manufacturing these chips. This is leading to an amazing unlock rate for the disabled cores on these chips. Armed with our 890 GX chipset board we will attempt to unlock the two hidden cores, and get this chip to extreme clocks. Lets dive into what should be a good time!