This IBM server memory DIMM module boasts a total capacity of 256 MB with a capacity per module of 256 MB. It has a bus speed of PC-100 and features ECC memory and registered technology. The module has 168 pins and is of form factor DIMM. It is compatible with various types of computers and servers, making it a versatile choice for those in need of additional memory. This memory module is a great choice for those looking to enhance their computing experience.