The Hynix 2GB (2x 1GB) 2Rx8 PC2-5300E-555-12 HYMP512U72CP8-Y5 AB-C Server RAM is a set of two DDR2 SDRAM modules with a total capacity of 2GB. Each module has a capacity of 1GB, and they are designed in a DIMM form factor with 240 pins. These server RAM modules are specifically designed for server components and feature ECC memory and registration for reliable performance in enterprise networking and server environments. With a bus speed of PC2-5300 (DDR2-667), this RAM is suitable for enhancing the performance and efficiency of HP and Dell server systems.