How to Fix CPU Thermal Throttling and Overheating

When a processor approaches its thermal limit—often around 95°C to 100°C—it protects itself by reducing voltage and clock speed. The result can be frame drops, slow renders, and inconsistent performance.

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Verify That the CPU Is Throttling

1. Open a trusted sensor tool such as HWiNFO64 in Sensors-only mode.
2. Locate CPU Package temperature and thermal-throttling flags.
3. Run a controlled workload and watch whether a flag changes to Yes.
4. Stop the workload if temperature exceeds the processor manufacturer’s documented limit.

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Step 1: Clean Dust and Restore Thermal Contact

1. Shut down and disconnect power.
2. Clean filters, fans, and heatsink fins.
3. If you are comfortable servicing the cooler, remove old paste with high-purity isopropyl alcohol.
4. Apply a small amount of fresh thermal compound and tighten the mount evenly in a diagonal pattern.

Laptop disassembly and liquid-cooler service may require a qualified technician.

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Step 2: Undervolt Carefully

Lower voltage can reduce heat, but unsupported settings can crash the system or corrupt active work. Record defaults and change only small increments.

Intel

Where firmware permits, begin with a modest negative offset such as -0.050V, stress-test, and monitor error logs.

AMD Ryzen

Use Precision Boost Overdrive’s Curve Optimizer, begin around -10, and test each core for stability before moving further.

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Step 3: Improve Airflow and Fan Curves

• Use filtered front or bottom intake and unobstructed rear or top exhaust.
• Keep cables away from primary airflow paths.
• Raise the PWM curve progressively and reach full fan speed near the upper safe temperature range.
• Check pump speed and radiator placement on liquid-cooled systems.

Thermal Diagnostic Matrix

Temperature	State	Action
Below 70°C	Normal load	No action
75–85°C	Heavy workload	Monitor consistency
85–94°C	Near thermal boundary	Check cooling and voltage
95°C+	Possible throttling	Stop, clean, and inspect mounting