HDX955FBK4DGI is a model 955 processor with locked clock multiplier. All other features of this processor are the same as on Phenom II X4 955 Black Edition CPU, and it's performance matches performance of non-overclocked 955 BE microprocessor. Currently (October 2009) the locked version of Phenom II 955 is available only as an OEM processor. The X955 will likely be released as a boxed processor with box part number HDX955FBGIBOX.