In this tutorial we will explore the main technical differences between DDR, DDR2 and DDR3 memories. Enjoy!

Before we start going into the specifics, you need to know that DDR, DDR2 and DDR3 are based on SDRAM (Synchronous Dynamic Random Access Memory) design, meaning that they use a clock signal to synchronize things. DDR stands for Double Data Rate, meaning that memories from this category transfer two data chunks per clock cycle. Translation: they achieve double the performance of memories without this feature running at the same clock rate (namely SDRAM memories, which are not available for PCs anymore).