Lenovo 73P4971-02, 0.5 GB, 1 x 0.5 GB, DDR2, 533 MHz, 240-pin DIMM Lenovo 73P4971-02. Internal memory: 0.5 GB, Memory layout (modules x size): 1 x 0.5 GB, Internal memory type: DDR2, Memory clock speed: 533 MHz, Memory form factor: 240-pin DIMM, CAS latency: 4