Lenovo TDSourcing - DDR2 - 4 GB: 2 x 2 GB - DIMM 240-pin - 400 MHz / PC2-3200 - CL3 - registered - ECC Chipkill - refurbished - for IBM eServer xSeries MXE 460/ Lenovo BladeCenter HS20/ JS21/ System x38XX/ x3950/ x3950 E