CPU Cooler
Keeps the CPU inside safe thermal limits so it can sustain its rated performance.
What is it?
A CPU cooler removes heat generated by the processor and dissipates it into the surrounding air, either through a metal heatsink and fan (air cooling) or a closed liquid loop (AIO liquid cooling).
What does it do?
It keeps the CPU below its thermal throttling point, allowing it to sustain higher clock speeds for longer under load instead of slowing itself down to avoid overheating.
Air cooling
A metal heatsink (often with heat pipes) draws heat away from the CPU, and one or more fans push air through it to carry heat away.
Liquid cooling (AIO)
A pump circulates liquid through a block on the CPU and a radiator, where fans dissipate the heat. Larger radiators (240mm, 280mm, 360mm) can dissipate more heat.
TDP Rating
Should meet or exceed your CPU's thermal design power for sustained performance.
Height / Radiator Size
Must physically fit within your case's clearance.
Noise
Larger, slower-spinning fans and radiators are typically quieter for the same cooling capacity.
An undersized cooler forces the CPU to throttle — reducing clock speed to stay within safe temperatures — which directly reduces real-world performance regardless of how capable the CPU itself is.
Better cooling lets a CPU sustain higher boost clocks for longer under continuous load (renders, exports, long gaming sessions), even if it doesn't change the CPU's rated maximum speed.
Common mistakes
- Pairing a performance-tier, high-TDP CPU with a budget air cooler.
- Not checking radiator clearance before buying a liquid cooler.
- Assuming liquid cooling is always quieter or better — a good large air cooler often matches a 240mm AIO.
How to choose
- Match the cooler's TDP rating to your CPU, with some headroom.
- Measure case clearance for air tower height or radiator size before buying.
- For essential/balanced builds, a quality air cooler is often the better value than an entry AIO.
See CPU Cooler products and pricing, or get a build recommended.