Before revision: A comparison between single data rate, double data rate, and quad data rate In computing, double data rate (DDR) describes a computer bus that transfers data on both the rising and falling edges of the clock signal .
After revision: and hence doubles the memory bandwidth by transferring data twice per clock cycleA comparison between single data rate, double data rate, and quad data rate In computing, double data rate (DDR) describes a computer bus that transfers data on both the rising and falling edges of the clock signal .