Refurbished 676331-B21-RF HP 4GB DDR3 Registered ECC PC3-12800

Operates on 1.5 Volts within speeds between 1066 and 1600 MT/s (million transfers per second). This is a 4GB module. Has a Memory Bus Type of PC-12800. Its ECC (Error Correction Code) features prevent data corruption and system failure which is typically ideal for server machines. Has a data transfer rate of 1600 Mhz.