Kingston Technology is the world?s independent memory leader and is well-known for providing high quality memory products at an attractive price. System Specific memory modules are designed and tested in the relevant systems prior to release; and they are guaranteed to be 100% compatible with your system. All Kingston System Specific memory come with a lifetime warranty. Memory clock speed: 667 Internal memory: 8192 Internal memory type: DDR2 Memory form factor: 240-pin DIMM CAS latency: 5 Memory voltage: 1.8 V ECC: Y Registered: Y Memory bus: 72 Lead plating: Gold Module configuration: 512M X 72 Chips organisation: X4 Compatibility: A2018596 (DELL); A2018597 (DELL); A2257191 (DELL); A2257192 (DELL); A2257193 (DELL); A2257194 (DELL); A2257195 (DELL); A2257196 (DELL); A2257197 (DELL); A2257198 (DELL) Rack mounting: 240-pin DIMM Memory ranking: Dual Rank