AGESA stands for AMD Generic Encapsulated Software Architecture. It's a set of software instructions that directs a computer's microprocessor (the “brain” of the computer) on how to work. AGESA makes sure the processor and other components of the computer can work together and helps them run programs, like web browsers or word processing software, faster. AGESA also helps the computer use power more efficiently, which means it won't use as much electricity and won't get as hot when it's working.