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Difficulty: EasyMotherboard, RAM, CPU, and Power Issues

A technician attempts to install a RAM upgrade in a laptop, but notices that the new memory module is physically too long to fit into the motherboard's memory slot. Which of the following best explains why the module does not fit?

  1. The technician acquired a standard full-size DIMM instead of an SO-DIMM module.Answer
  2. B
    The system POST beep code signaled a firmware incompatibility that locks the physical retention clips.
  3. C
    The RAM module must be installed across two alternating dual-channel slots to collapse into place.
  4. D
    The technician must immediately replace the motherboard to accept modern high-density memory modules.

Answer

The technician acquired a standard full-size DIMM instead of an SO-DIMM module.
Laptops use Small Outline Dual In-line Memory Modules (SO-DIMMs), which are approximately half the length of standard desktop Dual In-line Memory Modules (DIMMs). Attempting to insert a standard desktop DIMM into a laptop motherboard will fail because the module is physically too long.

Step-by-Step Solution

1
Compare RAM form factor requirements between desktop and mobile platforms.
Desktop systems use full-sized DIMM modules (~133.35 mm), while laptops use smaller SO-DIMM modules (~67.6 mm).
Compact laptop chassis designs mandate the smaller SO-DIMM form factor.
2
Identify the root cause of the physical incompatibility.
The purchased memory module is a full-sized desktop DIMM, making it physically impossible to insert into a laptop SO-DIMM slot.
Physical form factor mismatches prevent improper hardware installation.

Key Concept

RAM Form Factors (DIMM vs. SO-DIMM)
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Topics

Motherboard, RAM, CPU, and Power Issues

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