What is Socket?
The motherboard carries the interface to connect the CPU. This is referred to as a Socket. There are many socket types, with no clear naming scheme, though most are named after the number of pin sockets they contain. The latest Intel CPUs require a Socket 775 interface, while the latest AMD processors require a Socket AM2 interface. Some older CPUs like the Pentium 2 used a slot-like interface, called Slot 1.