Abstract: An adjustable circuit board support frame utilizes an adjustable frame assembly for receiving various size circuit boards having the desired interface connectors and logic circuits thereon so as to allow for necessary repair, expansion, or upgrade of the computer system. The present invention provides for the removability and replacement of any size circuit board within the computer housing at any time during manufacturing or in the field. A base computer system may be easily upgraded when more features are desired by interchanging the circuit board within the system and adjusting the frame assembly to the desired position.