Datasheet

DTM64328D
4GB - 240-Pin 2Rx8 Registered ECC DDR3 DIMM
Document 06944 , Revision A, 3-Oct-11, Dataram Corporation 

 2011 Page 11
149 DRAM Manufacturer ID Code, Most Significant Byte UNUSED 0x00
150-175 Manufacturer’s Specific Data UNUSED 0x00
176-255 Open for customer use UNUSED 0x00
Bytes: 122-125 change per DIMM.