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.
Thermal throttling is a built-in protection mechanism in CPUs and GPUs. When the chip temperature reaches a critical threshold — typically 90–105°C depending on the processor — the chip automatically reduces its clock speed to generate less heat and avoid permanent damage.
The practical result is that performance drops significantly under sustained load. A laptop that runs well for the first few minutes of a task — video rendering, gaming, compiling code — slows down noticeably as temperatures climb. This 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 (used on soft surface) | Very common | Use on hard flat surface |
| Singapore heat & humidity | Common factor | Thermal service + environment |
The most effective fix for thermal throttling on a laptop 2+ years old is a full thermal service: cleaning the fan and heatsink vents, and replacing the dried thermal paste between the CPU/GPU and heatsink. This typically reduces temperatures by 10–20°C and restores full sustained performance.
For gaming laptops with high-TDP CPUs and GPUs, liquid metal application (Thermal Grizzly Conductonaut) can reduce temperatures a further 10–20°C beyond standard repasting — allowing the chip to run at full speed without throttling under heavy load.
How do I know if my laptop is thermal throttling? +
The clearest sign is performance that starts strong then degrades after 10–15 minutes of sustained load. You can confirm with monitoring tools: HWiNFO64 (Windows) shows CPU/GPU temperature and clock speed simultaneously. If clock speed drops when temperatures peak, throttling is confirmed.
Does thermal throttling damage the laptop? +
Throttling itself is a protective measure — it prevents damage by slowing the chip before temperatures reach destructive levels. However, the underlying cause (inadequate cooling) does cause long-term damage if left unaddressed. Sustained high temperatures degrade the chip, solder joints, and battery over time.
Can undervolting fix thermal throttling? +
Yes — undervolting reduces the voltage supplied to the CPU, which lowers heat output without reducing performance. On Intel laptops, tools like ThrottleStop or Intel XTU can apply undervolts. However, many newer laptops have locked undervolting via BIOS. A thermal service (repasting + cleaning) is more universally effective.
How much does a thermal service cost in Singapore? +
Thermal services including fan cleaning and repasting are available at Affordable Laptop Services. Liquid metal application starts from $120. Free diagnosis to assess the best solution for your laptop.
Free thermal diagnosis. Fan cleaning, repasting, and liquid metal available. Same-day service.
