What is the difference in CPU sockets?
This is an area on the motherboard where the CPU is installed. Most CPUs are of the PGA (Pin Grid Array) type, meaning there are pins underneath the processor which are inserted into the socket. Generally, the name of the socket refers to the number of pins on the processor. A socket 754 Athlon CPU, for example, has 754 pins. Recently, Intel developed the LGA (Land Grid Array), meaning the pins are on the socket on the motherboard rather than on the processor.