ADATA 512MB DDR 400MHz, 0.5 GB, 1 x 0.5 GB, DDR, 400 MHz, 184-pin DIMM ADATA 512MB DDR 400MHz. Internal memory: 0.5 GB, Memory layout (modules x size): 1 x 0.5 GB, Internal memory type: DDR, Memory clock speed: 400 MHz, Memory form factor: 184-pin DIMM, CAS latency: 3