OC Inside ponders the meaning behind those alphanumeric characters known as part numbers. Does it matter? Well, they say that decoding the RAM part numbers can tell you the memory size of the module. "DDR, DDR2 and DDR3 memory modules can be overclocked very simple over the BIOS to get a better PC performance." If you want to find out what they get from part numbers like Micron D9GMH, you've come to the right place.