DVM26U1T8/4G is an Unbuffered 512Mx64 memory module, which conforms to JEDEC's DDR4-2666, PC4-2666 standard. The assembly is Single-Rank, comprised of eight 512Mx8 DDR4- 2666 SDRAMs. One 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.