HP 16GB 240-Pin DDR3 SDRAM ECC Registered DDR3L 1333 (PC3L 10600) System Specific Memory Low Voltage Model 647901-B21 Voltage: 1.35V Compatible System: Designed For: HPE ProLiant SL250s Gen8 Base 2U Left Tray Server, SL250s Gen8 Base 2U Right Tray Server Cas Latency: 9 Rank: 2Rx4