Socket 940
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| Type | PGA-ZIF |
|---|---|
| Chip form factors | OPGA |
| Contacts | 940 |
| FSB frequency | 200 MHz System clock 800/1000 MHz HyperTransport link |
| Voltage range | 0.8 - 1.55 V |
| Processors |
AMD Athlon 64 FX AMD Opteron |
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This article is part of the CPU socket series |
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Socket 940 is a 940-pin socket for 64-bit AMD server 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.
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 CPU's integrate a DDR controller, whereas AM2 models utilise a DDR2 controller.
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