Socket 940

Socket 940 was the first socket for microprocessors based on K10 microarchitecture. Introduced in April 2003 for Opteron CPU family, the socket was later used by first high-performance Athlon 64 FX CPUs, and then by dual-core Opterons. The socket supports dual-channel DDR SDRAM memory controller and three 800 MHz HyperTransport links. The socket became obsolete with the release of Second Generation Opteron family, which utilized socket AM2 for 1-way microprocessors, and socket F(1207) for 2-way and 4-way microprocessors.

The socket has 940 pin holes arranged as 31 x 31 grid, with 13 corner pins and 4 center pin pairs plugged. Socket dimensions are 5.03 cm x 5.92 cm or 1.98" x 2.33".

  Supported processors  

The socket 940 works with high-performance and server-class processors with frequencies up to 3 GHz. There are no mobile microprocessors for this socket. All families, supported by the socket, are listed in the table below. Please note that although all processors in the table will physically fit into the socket, not all of them may be supported by some motherboards. If you're upgrading an old computer system please make sure that the CPU is compatible with your motherboard. Please see "Upgrading socket 940 motherboards" section below for information on how to determine what microprocessors can be supported by your motherboard.

CPU Family	Frequency	The fastest CPU(s)
Athlon 64 FX	2200 MHz - 2400 MHz FX-51 - FX-53	Athlon FX-53
Dual-Core Opteron	1600 MHz - 2800 MHz	Dual-Core Opteron 290 Dual-Core Opteron 890
Opteron	1400 MHz - 3000 MHz	Opteron 256 Opteron 856

There are no Intel or VIA processors compatible with this socket.

  Compatible sockets  

None.

  Compatible package types  

940-pin lidded organic micro-PGA

  Upgrading socket 940 motherboards  

To determine what processors are supported you'll need to:

• Determine manufacturer and model of your motherboard,
• Search on manufacturer's website for the motherboard model.

For upgrade information for ABIT, ASRock, ASUS, Biostar, DFI, ECS, Gigabyte Technology, Jetway, MSI, PC Chips motherboards please check CPU-Upgrade motherboard database.