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Question:

Although the DDR4 and DDR5 DIMMs have the same number of pins, you can still distinguish them by the _______.

A Placement of the module key (notch).
explanation

A DDR5 DIMM's module key, also known as a notch, is located in the center of the module, whereas a DDR4 DIMM is slightly off center. Both are sold with heat sinks and come in a variety of colors. They are physically the same size.

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