DDR5 vs DDR4 – Evolution of Memory in Clock, Synchronization, and Architecture
Memory is the heart of a computer’s performance. With DDR5 memory entering the mainstream market, there is growing interest in how it compares with its predecessor, DDR4 . In this post, we break down the differences in architecture, operation, clock speeds, voltage, data transmission methods, and efficiency between DDR4 and DDR5, helping you understand the evolution of system memory. 1. What is DDR? DDR (Double Data Rate) memory transmits data on both the rising and falling edges of the clock signal, effectively doubling data throughput compared to SDR. DDR4 and DDR5 refer to the fourth and fifth generations of SDRAM standards, respectively. 2. Clock Speed and Bandwidth DDR4: 2133MHz ~ 3200MHz / Bandwidth up to ~25.6GB/s (at 3200MHz) DDR5: 4800MHz ~ 8400MHz / Bandwidth from ~38.4GB/s to 67.2GB/s DDR5 starts at significantly higher base clock speeds than DDR4, delivering substantially more data per second . 3....