Socket 940

Socket 940 is a 940-pin socket for 64-bit AMD Opteron server processors and AMD Athlon 64 FX consumer 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.

Socket 940
Socket 940.png
Chip form factorsOPGA
FSB frequency200 MHz System clock
800/1000 MHz HyperTransport link
Voltage range0.8 - 1.55 V
ProcessorsAMD Athlon 64 FX
AMD Opteron
PredecessorSocket A
SuccessorSocket F

This article is part of the CPU socket series

Technical specificationsEdit

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.[1]

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 use a DDR2 controller.[2]

See alsoEdit


  1. ^ Kronlund, Doug (2004-06-27). "Socket 940 vs. 939". Short-Media. Retrieved 2007-01-28. CS1 maint: discouraged parameter (link)
  2. ^ Bert Töpelt; Daniel Schuhmann; Frank Völkel (2006-05-23). "AM2: AMD Reinvents Itself". Tom's Hardware Guide. Retrieved 2007-01-28. CS1 maint: discouraged parameter (link)

External linksEdit