Timetec Hynix 8GB DDR3 1866MHz PC3-14900 Registered ECC 1.5V CL13 1R4 Single Rank 240 Pin RDIMM Server Memory Ram Module Upgrade (Server Only, Not for Desktop/Laptop) (8GB) HMT41GR7AFR8C-RDT8  DDR3  1866MHz  PC3-14900  240-Pin  Registered  ECC  1.5V  CL=13  Dual Rank  2Rx8 based  512x8 JEDEC standard 1.5V (1.425V ~1.575V) Power Supply Module Size: 8GB  Package: 1x8GB  A must For Server, Not For Desktop/Laptop For Selected ASRock, ASUS/ASmobile, Cisco, Dell, Fujitsu, Gigabyte, HP/Compaq, IBM, Intel, Lenovo, NEC, Quanta, Supermicro, Tyan Computers, Wiwynn Guaranteed  3 months warranty from Purchase Date  Free technical support (support@timetecinc.com)  Timetec website: https://www.timetecinc.com/