System Memory; Recommended Memory Configurations - Asus Maximus VIII Hero User Manual

1.2.4

System memory

The motherboard comes with four Double Data Rate 4 (DDR4) Dual Inline Memory Modules
(DIMM) slots.
A DDR4 module is notched differently from a DDR, DDR2, or DDR3 module. DO NOT
install a DDR, DDR2, or DDR3 memory module to the DDR4 slot.

Recommended memory configurations

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Chapter 1: Product Introduction