DTM68109-H is an Unbuffered 512Mx72 memory module, which conforms to JEDEC's PC4-2133 standard. The assembly is single-rank containing - nine SKHynix 512Mx8 DDR4-2133 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 in a Fly-by topology.