Editing Socket 940

{{CPU socket
|name=Socket 940
|image=[[File:Socket 940.png|290px]]
|formfactors=[[OPGA]]
|type=[[Pin grid array|PGA]]-[[Zero insertion force|ZIF]]
|contacts=940
|protocol=
|fsb=200 MHz System clock<br /> 800/1000 MHz [[HyperTransport]] link
|voltage=0.8–1.55 V
|processors=[[AMD]] [[Athlon 64|Athlon 64 FX]]<br/> [[AMD]] [[Opteron]]
| predecessor= [[Socket A]]
| successor= [[Socket F]]}}
{{Short description|CPU socket for old AMD CPUs}}
'''Socket 940''' is a 940-pin socket for 64-bit [[AMD]] [[Opteron]] server processors and AMD [[Athlon 64|Athlon 64 FX]] consumer processors. It was one of the first sockets designed for AMD's [[AMD64]] range of 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|Athlon 64 FX]] ([[FX-51]]) use Socket 940.

==Technical specifications==
[[Microprocessor]]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 the acceptance of only [[registered memory]].<ref>{{cite web|url=http://www.short-media.com/articles/socket_940_vs_939|archive-url=https://web.archive.org/web/20070308123750/http://www.short-media.com/articles/socket_940_vs_939|url-status=usurped|archive-date=March 8, 2007|last=Kronlund|first=Doug|date=2004-06-27|publisher=Short-Media|title=Socket 940 vs. 939|accessdate=2007-01-28}}</ref> 

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 CPUs integrate a [[DDR SDRAM|DDR]] controller, whereas AM2 models use a [[DDR2 SDRAM|DDR2]] controller.<ref>{{cite web|url=http://www.tomshardware.com/reviews/amd-reinvents,1258-21.html|title=AM2: AMD Reinvents Itself|accessdate=2007-01-28|author=Bert Töpelt|author2=Daniel Schuhmann |author3=Frank Völkel |date=2006-05-23|publisher=Tom's Hardware Guide}}</ref>

==See also==
*[[List of AMD microprocessors]]

==References==
<references/>

==External links==
*{{usurped|1=[https://web.archive.org/web/20061124025715/http://www.amd.com/us-en/Processors/ProductInformation/ AMD Product Information]}}
*{{usurped|1=[https://web.archive.org/web/20061228193105/http://www.amd.com/us-en/Processors/TechnicalResources/0,,30_182_739_7203,00.html AMD Technical Details for Athlon64 and Athlon FX]}}
*{{usurped|1=[https://web.archive.org/web/20090612015243/http://support.amd.com/us/Processor_TechDocs/25766.pdf AMD Socket 940 Design Specification (rev 3.03)]}}
*{{usurped|1=[https://web.archive.org/web/20101214110154/http://support.amd.com/us/Processor_TechDocs/31412.pdf AMD 940 Pin Package Functional Data Sheet (rev 3.05)]}}

{{amdsock}}

[[Category:AMD server sockets]]