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s940 and s939

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Different processors for each platform. For the near future, s940 will be aimed towards server/workstation machines. s939 will be for the desktop. :)

J.
 
Socket940 is home for most Opterons and the aging FX-51 and FX-53 CPUs.
Socket939 is home for just about everything else, from Newcastles to Winchesters to Venices to San Diegos. FX-55 and FX-57 both live here.

-They are not cross-compatible
-Socket940 motherboards usually don't have much in the way of overclocking, while Socket939 does.

:)
 
The pinout is the same, except S939 is missing one pin. If I remember correctly, the missing pin is used to detect the presence of a CPU in the socket (usefull in multi-CPU systems).
 
people are working on getting 939 chips to work in 940 boards but no one has come up with a solution yet

The pin 939 chips are missing is the registered ram pin.

If you arnt planning on running multiple CPUs I would say there is no advantage to using socket 940. I suppose server boards with PCI-X are way easier to find for socket 940, but unless you need PCI-X or multiple CPUs you wont really find any advantages. + with socket 940 you will have to buy registered ram wich is much more expensive
 
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