Capacity: 16GB DDR3 1600MHz PC3-12800 desktop memory module. Compatibility: Requires a compatible motherboard and CPU (Intel 5th Generation or newer, such as Broadwell, Skylake, Kaby Lake, etc.) Important Note: This 16GB module configuration is not supported on older CPUs (pre-5th Gen Intel or AMD A-series) due to memory controller limitations. Please verify your system compatibility before purchasing to avoid boot failure.