The DRHZ2400R upgrades are registered memory modules, which conform to JEDEC's DDR4, PC4-2400T standard. The DRHZ2400LR are load-reduced memory modules (LRDIMMs). One EEPROM is used for Serial Presence Detect and a combination register/PLL, with Address and Command Parity is also used.
32GB DDR4 SDRAM Memory Module