GPT:  In fact, it's backwards. Overclocking generally reduces stability. If
increasing clocks or changing BIOS settings makes the system stable, it usually
means something deeper is wrong.

Common possibilities include:
 - Faulty CPU.
 - Bad RAM or unstable memory settings (XMP/EXPO, timings, voltage).
 - Motherboard or BIOS bug.
 - Failing power delivery (VRMs or PSU).
 - Incorrect BIOS defaults.
 - The "overclock" is actually increasing voltage or changing load-line
calibration enough to mask an underlying hardware issue.