HP 2048MB of Advanced ECC PC2100 DDR SDRAM DIMM Memory Kit (1x2048MB), 2 GB, DDR, 184-pin DIMM HP 2048MB of Advanced ECC PC2100 DDR SDRAM DIMM Memory Kit (1x2048MB). Internal memory: 2 GB, Internal memory type: DDR, Memory form factor: 184-pin DIMM