Socket 940
Encyclopedia
Socket 940 is a 940-pin socket for 64-bit AMD server processors. This socket is entirely square in shape and pins are arranged in a grid with the exception of four key pins used to align the processor and the corners. AMD's Opteron
and the older AMD Athlon 64 FX
(FX-51) use Socket 940.
s designed for this socket were intended to be used in a server platform, and as such provide additional features to provide additional robustness. One such feature is only the acceptance of registered memory
.
While the more recent 940-pin socket AM2
is visually similar to this one, the two are electrically incompatible due to the integrated memory controller
. Socket 940 CPU's integrate a DDR
controller, whereas AM2 models utilise a DDR2
controller.
Opteron
Opteron is AMD's x86 server and workstation processor line, and was the first processor which supported the AMD64 instruction set architecture . It was released on April 22, 2003 with the SledgeHammer core and was intended to compete in the server and workstation markets, particularly in the same...
and the older AMD Athlon 64 FX
Athlon 64
The Athlon 64 is an eighth-generation, AMD64-architecture microprocessor produced by AMD, released on September 23, 2003. It is the third processor to bear the name Athlon, and the immediate successor to the Athlon XP...
(FX-51) use Socket 940.
Technical specifications
MicroprocessorMicroprocessor
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...
s designed for this socket were intended to be used in a server platform, and as such provide additional features to provide additional robustness. One such feature is only the acceptance of registered memory
Registered memory
Registered memory modules have a register between the DRAM modules and the system's memory controller. They place less electrical load on the memory controller and allow single systems to remain stable with more memory modules than they would have otherwise...
.
While the more recent 940-pin socket AM2
AM2
AM2 can refer to:* The Achievement Measurement 2 Practical Skills Test required for becoming an Electrician within Britain* Socket AM2, a CPU socket for AMD desktop processors* Sega AM-2, a research and development team for the video game company Sega...
is visually similar to this one, the two are electrically incompatible due to the integrated memory controller
Memory controller
The memory controller is a digital circuit which manages the flow of data going to and from the main memory. It can be a separate chip or integrated into another chip, such as on the die of a microprocessor...
. Socket 940 CPU's integrate a DDR
DDR
DDR may refer to:In entertainment:*Dance Dance Revolution, a music video game series by Konami*DDR , a Norwegian rock band singing in German.*DDR , a Greenlandic punk band singing in Danish.In organizations:...
controller, whereas AM2 models utilise a DDR2
DDR2
DDR2 may refer to:* DDR2 SDRAM, the computer memory technology* Dance Dance Revolution 2ndMix, the video game* DDR2 , a human gene...
controller.