Dragon_Fish :
I searched it, but I couldn't get a clear answer. Isn't it the speed of the memory?
Scientific: The number of pulses emitted from a computer's clock in one second; it determines the rate at which logical or arithmetic gating is performed in a synchronous computer. An electrical current that alternates between high and low voltages. The speed of the clock is measured in Megahertz (MHz).
Well, the frequency is essentially how fast something processes in a computer. In this case(memory), it determines how fast information is going to go to your memory and back. DDR, DDR2, DDR3 memories follow the DDRxxx/PCyyyy classification. The first number, xxx, indicates the maximum clock speed that the memory chips support. For instance...