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Difficulty: MediumRAM Types and Characteristics

A technician is installing RAM into a compact edge server motherboard that features four SO-DIMM memory slots labeled Slot A1, Slot A2, Slot B1, and Slot B2. The motherboard documentation states that slots with the same letter share a memory channel. The system currently has no RAM installed, and the technician has two identical 16 GB DDR4 SO-DIMM modules. Which module placement will successfully enable dual-channel memory operation?

  1. Place one module into Slot A1 and the second module into Slot B1.Answer
  2. B
    Place one module into Slot A1 and the second module into Slot A2.
  3. C
    Install full-sized 288-pin DDR4 DIMM modules into Slot A1 and Slot B1.
  4. D
    Place both modules into Slot A1 using a dual-capacity expansion riser.

Answer

Place one module into Slot A1 and the second module into Slot B1.
Dual-channel memory technology doubles the communication bandwidth between the memory controller and RAM by utilizing two separate 64-bit channels simultaneously. To enable dual-channel mode, identical memory modules must be installed into designated slots across different channels—in this scenario, placing one module into Slot A1 (Channel A) and the second module into Slot B1 (Channel B).

Step-by-Step Solution

1
Identify memory slot labeling and channel pairing rules.
Slots A1 and A2 belong to Channel A, while Slots B1 and B2 belong to Channel B.
Dual-channel architecture requires memory modules to be distributed across two independent channels.
2
Select matching slots across separate channels.
Installing one module in Slot A1 and the second in Slot B1 satisfies the dual-channel requirement.
Populating one slot per channel allows the memory controller to communicate with both modules simultaneously over a 128-bit total bus width.

Key Concept

Dual-Channel RAM Slot Population Rules
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Topics

RAM Types and Characteristics

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