Thermal throttling
Automatic clock-speed reduction when a CPU or GPU hits its thermal limit. Protects silicon from damage but cuts performance — often the single biggest gap between spec-sheet and real-world results.
When a CPU or GPU hits its junction temperature limit (typically 95–110 °C), firmware drops the clock to bring temperature back down. Repeated thermal throttling shows up as falling frame rates in long gaming sessions or extended Cinebench runs.
Common causes
- Undersized cooler for the TDP.
- Dried thermal paste (3+ year-old laptop).
- Dust-clogged intake.
- Ambient temperature far above typical office (gaming in a hot room).
How to spot it in reviews
Compare a chip's first-minute and tenth-minute scores on a sustained load. A drop of 20%+ signals thermal throttling. Top-tier ultrabooks with thin chassis often throttle hard; gaming laptops with vapor chambers hold their boost much longer.
In comparisons
Two laptops with the same chip can differ by 30%+ on sustained workloads purely because of cooling design. The spec sheet won't reveal this — only review benchmarks will.
How to use Thermal throttling in a real comparison
Automatic clock-speed reduction when a CPU or GPU hits its thermal limit. Protects silicon from damage but cuts performance — often the single biggest gap between spec-sheet and real-world results. In practice, this is most useful as one part of a decision rather than a standalone quality badge. Compare it alongside the workload, room, ecosystem, budget, and ownership constraints that apply to you; the strongest published figure is not automatically the best outcome for every buyer.
What to check next
On vsMars, read together so the value has product-specific context. It is especially relevant in .
Avoid the one-number trap
Manufacturers can describe the same capability under different conditions. Compare like-for-like variants, check the unit and test condition where available, and use a head-to-head page to see whether a measurable difference is material for your own use.
vsMars presents structured catalog values to make trade-offs legible. The linked product and spec pages are the right place to inspect the underlying values before buying.