Socket 940

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.

Socket 940
TypePGA-ZIF
Chip form factorsOPGA
Contacts940
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

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.[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 CPUs integrate a DDR controller, whereas AM2 models use a DDR2 controller.[2]

See also

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