AMD Phenom II 9xx CPUs With DDR3 Support
 

Today we are going to test two 9xx series processors including the new flagship Phenom II X4 955. To differentiate new processors from the older models supporting DDR2, the number "5" is added to their index. For example, the model 945 differs from the former flagship (model 940) only by DDR3 support (and a locked multiplier).

http://ixbtlabs.com/articles3/cpu/am...25-955-p1.html