Cooling and sustained performance
Cooling decides how long a laptop can hold its top speed. Weak cooling makes even a fast chip slow down under load — the effect is called throttling.
Processors and GPUs convert power into heat. A laptop's thermal design — heat pipes, fans and vents — determines how much power the chips can sustain. When temperatures approach the silicon limit (tj max), the chip deliberately reduces its speed: thermal throttling.
What to compare
- Power class (TDP) — the same CPU model can be configured at different power limits in different laptops; higher limits mean more sustained speed.
- Chassis thickness — thin bodies throttle sooner; performance laptops carry bigger heatsinks and fans.
- Sustained vs peak speed — measurements under sustained load matter more than burst benchmarks.
Higher-performance CPUs
100 °C · n = 344
Mainstream CPUs
100 °C · n = 344
Median silicon temperature limit by catalog CPU performance class.
How it affects your choice
If you run heavy tasks for hours (rendering, compiling, gaming), prioritise models known for sustained performance over the thinnest body. For office work, effective cooling is a comfort feature: the fans stay quiet because they rarely need to spin up.