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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