Glossary/Thermal/Throttle point

Throttle point

The throttle point is the temperature at which a chip begins reducing clocks to protect itself, commonly 95-105 °C on CPUs and 83-90 °C on GPUs.

Also known as thermal limit, TjMax, temperature limit

Not measurable from a browser

A browser cannot read temperatures, power draw, fan speed, VRAM capacity, clock frequency or native FLOPS. For a direct reading use a native monitor such as HWiNFO64, GPU-Z or lm-sensors. SystemCheck contributes the other half: whether the condition is costing you throughput, measured as decay and consistency.

The throttle point is set in firmware and is not a damage threshold. Chips are designed to operate at it continuously. Some modern CPUs are explicitly intended to run at their limit and boost until they reach it, so hitting the throttle point is expected behaviour rather than evidence of a broken cooler.

What matters is how quickly it is reached and how far frequency falls once there. A chip that reaches its limit after ten minutes and gives up 5% of its clock is fine. One that reaches it in twenty seconds and gives up 40% has a real cooling or mounting problem. The temperature alone does not distinguish these cases; the performance response does.

SystemCheck cannot read the throttle point or your current temperature. Browsers expose no thermal sensors at all. It measures the second half of that question: how much performance you lose and how quickly. Combine SystemCheck's decay figure with a temperature log from HWiNFO64 for the complete picture.

Related terms

Thermal throttlingThermal throttling is a processor reducing its clock speed and voltage automatically once it reaches a temperature limit, to avoid damage.Read more Junction temperatureJunction temperature is the temperature of the semiconductor die itself, the hottest and most safety-relevant reading, always above the package or case temperature.Read more Thermal decayThermal decay is the measurable fall in performance from the start of a sustained load to its steady state as the system heats and hits its limits.Read more Thermal headroomThermal headroom is the gap between a component's current temperature and its throttle point, which determines how long it can sustain boost clocks.Read more Delta TDelta T is the difference between a component's temperature and the ambient air, and it is the only fair way to compare cooling across rooms and seasons.Read more

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