46W0784. Operates on 1.05 Volts within speeds between 533 and 800 MT/s (million transfers per second). This is a 4GB module. Contains a PC-17000 Memory Bus Type. Uses ECC (Error Correcting Code), ideal when system failure must be avoided at all costs. Is also registered which makes it stable enough for server conditions. You can expect the data to transfer at a rate of 2133 Mhz.