Memory: Computer not detecting full RAM capacity

4.5

Installed 16GB but Windows only shows 8GB or "8GB usable".

Symptoms
  • Missing RAM
  • Hardware reserved high
  • BIOS shows less RAM
Possible Causes
  • Loose stick
  • Dead RAM slot
  • Incompatible sticks

Step-by-Step Fix

1

Reseat RAM Sticks

Power off, remove RAM, and click them back into place firmly.

2

Test Sticks Individually

Boot with one stick at a time to find the faulty one.

3

Check BIOS Settings

Ensure "Memory Remapping" is enabled if available.

When to See a Technician

If RAM is "Hardware Reserved", it often means the stick is detected but failed its initial self-test.

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