Asus P9X79 WS - System Memory

Recommended memory congurations
2.2.4 System memory
The motherboard comes with four Double Data Rate 3 (DDR3) Dual Inline Memory
Modules (DIMM) slots.
A DDR3 module is notched differently from a DDR or DDR2 module. DO NOT
install a DDR or DDR2 memory module to the DDR3 slot.
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ASUS P9X79 WS 2-5