Socket 478 is an Intel-based socket designed for the earlier generations of the Pentium 4 and Celeron processors. These sockets use a PGA (pin grid array) interface that allows for processor upgrades with relatively little computer knowledge. The 478 socket allows for processors up to the Pentium 4 Extreme edition to be installed. This processor upgrade may provide significant improvement to a computer's operating efficiency at a lower cost than simply replacing the computer.
Instructions
1. Disconnect the computer from any electrical sources and remove the side access panel. This may require the removal of two thumbscrews on the rear of the computer.
2. Locate the CPU fan and socket. These are usually located in the upper-left corner of the computer's motherboard.
3. Remove the CPU heatsink and fan assembly. This assembly will be held in place over the processor with a simple lever that holds the heatsink in place.
4. Locate the socket release lever. This is located to the side of the 478 CPU socket.
5. Lift the release lever away from the motherboard. This unlocks the CPU from the socket.
6. Lift the CPU out of the socket, holding it by the edges.
7. Insert the new processor into the socket. This socket is keyed and will accept the processor in only one orientation.
8. Attach the heatsink and fan assembly that came with the CPU as per the instructions that accompanied the specific processor being installed.
9. Replace the computer's side access panel and reestablish its electrical connections.
Tags: access panel, heatsink assembly, Locate socket, release lever, side access