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Reinderien
Asked: 2017-01-18 13:23:26 +0800 CST

Incompatible server memory

  • 772

Why are these two pinouts different? They are keyed differently. See attached pictures.

memory stick labels memory stick pins

hardware memory

1 Answers

  1. Best Answer

    It's simply another type of DDR model.

    https://en.wikipedia.org/wiki/DIMM

    or from http://www.ocinside.de/review/crucial_4x4gb_ddr4_2133/

    By the way, not only the number of pins, which have risen from 240-pin (DDR3) to 288-pin (DDR4), but also the DDR4 module design is new, because the bottom of the modules is no longer plane, but slightly flattened on both sides. In addition also the (voltage) notch is on another position, to avoid that one is accidentally installing DDR4 modules in a DDR3 socket or DDR3 modules in a DDR4 slot. DDR3 and DDR4 memory is not pin compatible.

    enter image description here

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