KTD-WS670/4G double sided . Dell DDR2 PC2-3200 400MHz RAM Memory DIMM Registered ECC will be the perfect match for your upgrade or replacement requirements. Kingston KTD- WS670/4G 4GB Dell DDR2 PC2-3200 400MHz RAM Memory DIMM Registered ECC modules are supplied with a lifetime warranty giving you the assurance of the quality of Kingston memory products. The specification of this Kingston memory RAM module is: 4GB Reg ECC 400Mhz DDR2 | Registered ECC | 1.8v | Dual Rank DR x4 | CL3 | 400Mhz PC2-3200 Kingston Support: http://www.kingston.com/us/support/technical/search