DDR3 memory is a type of computer memory known as Dynamic Random Access Memory (DRAM). It is commonly used in personal computers, laptops, and servers to store data temporarily while the system is running. DDR3 stands for "Double Data Rate 3," indicating that it can transfer data twice per clock cycle, which improves performance compared to its predecessor, DDR2. One of the key features of DDR3 memory is its higher bandwidth and lower power consumption, making it more efficient for modern applications. It typically operates at speeds ranging from 800 to 2133 MT/s (megatransfers per second) and has a voltage of 1.5 volts, which helps reduce energy usage in devices.