Lenovo 2GB PC2-5300 CL5 Non-Parity (NP) DDR2 SDRAM UDIMM Memory, 2 GB, DDR2, 667 MHz, 240-pin DIMM Lenovo 2GB PC2-5300 CL5 Non-Parity (NP) DDR2 SDRAM UDIMM Memory. Internal memory: 2 GB, Internal memory type: DDR2, Memory clock speed: 667 MHz, Memory form factor: 240-pin DIMM, CAS latency: 5