The used IBM 77P8919 is an 8GB PC3-8500R 2RX4 DDR3-1066 ECC RDIMM server memory module designed for use in compatible IBM servers. This memory module is a great option for upgrading server memory without having to purchase new equipment, and it has been tested to ensure it meets IBM's quality standards.
The IBM 77P8919 memory module operates at a memory speed of 1066MHz and has a memory rank of 2Rx4. It is designed to work with servers that support registered ECC memory, which provides an extra layer of data protection and helps prevent system crashes.
This memory module is compatible with a wide range of IBM System x and BladeCenter servers, including but not limited to:

IBM System x3650
IBM System x3755
IBM BladeCenter HS21
IBM BladeCenter LS21
IBM BladeCenter LS41

Please note that this is not an exhaustive list of compatible servers, and it is always important to verify compatibility with your specific server model before making a purchase.
Substitute part numbers for the IBM 77P8919 include 44T1492, 43X5052, and 43X5050.