Socket 940

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CPU socket for old AMD CPUs

title: "Socket 940" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["amd-server-sockets"] description: "CPU socket for old AMD CPUs" topic_path: "general/amd-server-sockets" source: "https://en.wikipedia.org/wiki/Socket_940" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary CPU socket for old AMD CPUs ::

|name=Socket 940 |image=[[File:Socket 940.png|290px]] |formfactors=OPGA |type=PGA-ZIF |contacts=940 |protocol= |fsb=200 MHz System clock 800/1000 MHz HyperTransport link |voltage=0.8–1.55 V | dimensions = 40 mm × 40 mm 1,600 mm² |processors=AMD Athlon 64 FX AMD Opteron | predecessor= Socket A | successor= Socket F}} Socket 940 is a 940-pin socket for 64-bit AMD Opteron server processors and AMD 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 FX (FX-51) use Socket 940.

Technical specifications

Microprocessors 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.

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 controller, whereas AM2 models use a DDR2 controller.

References

References

  1. Kronlund, Doug. (2004-06-27). "Socket 940 vs. 939". Short-Media.
  2. Bert Töpelt. (2006-05-23). "AM2: AMD Reinvents Itself". Tom's Hardware Guide.

::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::

amd-server-sockets