What Does Pin Grid Array (PGA) Mean?
A pin grid array (PGA) is the integrated circuit packaging standard used in most second- through fifth-generation processors. Pin grid array packages were either rectangular or square in shape, with pins arranged in a regular array. Pin grid array was preferred for processors with larger-width data buses than dual in-line pins, as it could handle the required number of connections better.
Techopedia Explains Pin Grid Array (PGA)
The pin grid array started with the Intel 80286 microprocessor. It was mounted on a printed circuit board either by insertion into a socket or occasionally by the through-hole method. Pin grid arrays had many variations, such as: