The Intel Core i5-8400 is a 6-core processor from Intel's 8th generation of CPUs, known as Coffee Lake. It operates at a base clock speed of 2.8 GHz and can boost up to 4.0 GHz, providing a good balance of performance for everyday tasks and gaming. This processor supports DDR4 memory and has a thermal design power (TDP) of 65 watts, making it energy-efficient. It also features integrated Intel UHD Graphics 630, allowing users to run applications and light games without needing a dedicated graphics card.