Socket 604 is a 604 pin microprocessor

Microprocessor

A microprocessor incorporates the functions of a computer's central processing unit on a single integrated circuit, or at most a few integrated circuits. It is a multipurpose, programmable device that accepts digital data as input, processes it according to instructions stored in its memory, and...

 socket designed to interface an Intel's Xeon

Xeon

The Xeon is a brand of multiprocessing- or multi-socket-capable x86 microprocessors from Intel Corporation targeted at the non-consumer server, workstation and embedded system markets.-Overview:...

 processor to the rest of the computer. It provides both an electrical interface as well as physical support. This socket is designed to support a heatsink.

Technical specifications

Socket 604 was designed by Intel as a zero insertion force socket intended for workstations and server platforms. While the socket contains 604 pins, it only has 603 electrical contacts, the last being a dummy pin. Each contact has a 1.27mm pitch with regular pin array, to mate with a 604-pin processor package.

Socket 604 processors utilize a bus speed of either 400, 533, 667, 800, or 1066 MHz and were manufactured in either a 130 nm process, 90 nm process, 65 nm process or 45 nm process. Socket 604 processors cannot be inserted into Socket 603

Socket 603

Socket 603 is a motherboard socket for Intel's Xeon processor.-Technical specifications:Socket 603 was designed by Intel as a zero insertion force socket intended for workstations and server platforms. It contains 603 contacts arrayed in a grid about the center of the socket, each contact has a...

 designed motherboards due to one additional pin being present, but Socket 603 processors can be inserted into Socket 604 designed motherboards, since the extra pin slot does not do anything for a 603 CPU.

Socket 604 processors range from 1.60 GHz through 3.80 GHz, with the higher clock rates only found among older, slower NetBurst-based Xeons.

The following Intel Xeon chipsets

Intel Xeon chipsets

Around the time that the Pentium 3 processor was introduced, Intel's Xeon line diverged from its line of desktop processors, which at the time was using the Pentium branding....

used Socket 604:

• Intel E7500
• Intel E7501
• Intel E7205
• Intel E7320
• Intel E7520
• Intel E7525

Late Socket 604 "revive":

• Intel 7300 (For Core based "Xeon Tigerton" since September 6 2007 and also Core2 based "Xeon Dunnigton" since September 15 2008)