The DRL1600LR/32G upgrade is a load reduced 4Gx72 memory module, which conforms to JEDEC's DDR3, PC3L-10600L standard. The assembly is Quad-Rank.The ranks are comprised of eighteen 2Gx4 DDP (Dual Die Pack) DDR3 SDRAMs. One 2K-bit EEPROM is used for Serial Presence Detect and an Isolation Memory Buffer, which enables higher system memory bandwidth at DDR3 speeds up to 1600 MT/s.