DDR3-1600, also known as PC3-12800. It is the third generation of the DDR (Double Data Rate) memory technology, and it has a clock speed of 1600 MHz, which is faster than the previous DDR2 technology. The ""PC3"" in the name refers to the module's peak data transfer rate, which is 12800 MB/s, or 12.8 GB/s. It is also backward compatible with systems that use DDR3-1333 and DDR3-1066 memory. The PC3 12800 DDR3 1600 MHz Type Ram is a higher-performance RAM that is typically used in high-end desktops and laptops for gaming and other demanding applications that require fast data transfer and processing speeds. It is also used in servers, workstations and other enterprise-level systems. Overall, PC3 12800 DDR3 1600 is a powerful and efficient type of RAM that can improve the performance of your computer.