Product Id: 30208815
Description: AddOn - DDR3 - 8 GB - DIMM 240-pin - 1866 MHz / PC3-14900 - CL13 - 1.5 V - registered - ECC - for Lenovo ThinkServer RD340; RD440; RD540; RD640; TD340
Mfr Part #: 4X70F28586-AMKThis Lenovo 4X70F28586 compatible 8GB DDR3-1866MHz Single Rank Registered ECC 1.5V 240-pin CL13 factory original RDIMM is 100% guaranteed to be compatible with your system and to work right the first time. Adding additional memory is the best way to increase the performance of your system. All the memory is built to strict JEDEC standards to meet or exceed the Tier 1 OEM's factory requirements.