This IBM server memory module is designed for reliable and efficient performance. With a capacity of 2GB and a bus speed of PC2-5300 (DDR2-667), it can handle demanding applications with ease. The memory features ECC memory and fully buffered technology to ensure data integrity and stable operation.This module is compatible with DDR2 FB-DIMM SDRAM systems and is an ideal choice for upgrading or replacing existing server memory. It has been fully tested and certified by IBM for optimal performance and comes with the part numbers OPT:39M5791 and FRU:39M5790. Buy with confidence in knowing that you are getting a quality product from a trusted brand.