Thermal Throttling
When a CPU or GPU gets too hot, it automatically slows itself down to prevent damage. The result: your laptop feels fast at first, then becomes noticeably sluggish after 10–15 minutes of use.
- What It Is
- What Causes It
- How to Fix It
- People Also Ask
Thermal throttling is a built-in protection mechanism. When the chip temperature reaches a critical threshold — typically 90–105°C — the chip automatically reduces its clock speed to generate less heat and avoid permanent damage.
A laptop that runs well for the first few minutes then slows noticeably during gaming or rendering — that is thermal throttling in action.
| Cause | How Common | Fix |
|---|---|---|
| Dried thermal paste | Very common (3–5 yr laptops) | Repasting |
| Clogged heatsink/vents | Very common | Fan & heatsink cleaning |
| Failing fan | Common | Fan replacement |
| Poor airflow (soft surface) | Very common | Use on hard flat surface |
| Singapore heat & humidity | Common factor | Thermal service + environment |
The most effective fix is a full thermal service: cleaning the fan and heatsink vents, and replacing the dried thermal paste. This typically reduces temperatures by 10–20°C and restores full sustained performance.
For gaming laptops, liquid metal application can reduce temperatures a further 10–20°C beyond standard repasting.
How do I know if my laptop is thermal throttling?
Performance that starts strong then degrades after 10–15 minutes. Confirm with HWiNFO64: if clock speed drops when temperatures peak, throttling is confirmed.
Does thermal throttling damage the laptop?
Throttling itself is protective. However, the underlying inadequate cooling causes long-term damage — sustained high temperatures degrade the chip, solder joints, and battery.
Can undervolting fix thermal throttling?
Yes — undervolting reduces heat output without reducing performance. Tools like ThrottleStop work on many Intel laptops. However, many newer laptops have locked undervolting. A thermal service is more universally effective.
How much does a thermal service cost in Singapore?
Available at Affordable Laptop Services. Liquid metal from $120. Free diagnosis.
Free thermal diagnosis. Fan cleaning, repasting, and liquid metal available. Same-day service.
