GDDR5 is a type of graphics memory used in high-performance graphics cards and gaming consoles. It stands for Graphics Double Data Rate 5 and is designed to provide faster data transfer rates compared to its predecessor, GDDR3. This allows for improved performance in rendering graphics, making it ideal for gaming and professional applications. One of the key features of GDDR5 is its ability to transfer data on both the rising and falling edges of the clock signal, effectively doubling the data rate. This results in higher bandwidth, which enhances the overall speed and efficiency of graphics processing, contributing to smoother visuals and better frame rates in games and applications.