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: 1066 Internal memory: 4096 Internal memory type: DDR3 Memory form factor: 204-pin SO-DIMM CAS latency: 7 Memory voltage: 1.5 V Registered: N Memory bus: 64 Lead plating: Gold Module configuration: 512M X 64 Compatibility: PA3677U-1M4G (Toshiba); PAME4006 (Toshiba) Rack mounting: 204-pin SODIMM