System Memory - Asus Pro WS 621-64L SAGE Series Manual

1.4

System memory

The motherboard comes with twelve (12) Dual Inline Memory Modules (DIMM) slots
designed for DDR4 (Double Data Rate 4) memory modules.
A DDR4 memory 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.
ASUS Pro WS C621-64L SAGE Series
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