DTM64389E is an Unbuffered 1Gx64 memory module, which conforms to JEDEC's DDR3, PC3-12800 standard.
The assembly is Dual-Rank. Containing: sixteen Micron 512Mx8 DDR3 SDRAMs. One 2K-bit EEPROM is used for Serial Presence Detect. Both output driver strength and input termination impedance are programmable to maintain signal integrity on the I/O signals.