Socket-603 is a 603-contact CPU socket used by some Intel Xeon processors.

Socket-603 supports a 400MHz Front Side Bus. The Socket-604 supports a 533Mhz Front Side Bus (FSB).

The Socket-603 is a Pin Grid Array (PGA) Zero Insertion Force (ZIF) socket.

A ZIF socket features a lever on one side of the socket. When this lever is pulled up, the spring contacts inside the socket are opened. This allows the CPU to be inserted easily into the socket. The lever is then pushed down, closing the spring contacts and clamping the CPU into place.

Socket-603 Specifications

For full specifications on Socket-603, refer to 603 Pin Socket Design Guidelines.