How to Choose the Right CPU Cooler

To choose the right CPU cooler, match the cooler to your chip’s heat output, your case and your budget — and ignore the marketing, because the right cooler is the one that keeps your chip cool without costing more than the CPU. Follow the steps below and you will not waste money on a cooler that is too small, too big or too loud.

Step 1: check your CPU’s heat output (TDP)

Start with the chip. A 65W chip, such as a Ryzen 7 9700X, is easy to cool and needs only a mid-range air cooler. A 125W chip, such as a Ryzen 9 9950X, needs a large air cooler or a 240mm AIO. A 250W chip, such as a 14900K, needs a 360mm AIO. Our CPU cooling basics guide explains the air vs liquid choice, and our CPU benchmarks explained guide shows how a cooler that is too small makes the chip throttle and score lower.

Step 2: check your case and RAM clearance

Measure before you buy. A big air cooler can be 160mm tall and may not fit a small case, and it can block tall RAM sticks. An AIO radiator needs a mounting spot — usually the top or the front of the case — and the right size, 240mm or 360mm. Check your case manual for the maximum cooler height and the radiator sizes it supports. If you are building your first PC, our best desktop CPU for a first PC build guide recommends a stock cooler for a budget chip, and that is money saved for the parts that matter.

Step 3: pick a cooler type

There are four sensible choices. The stock cooler that comes in the box is fine for a budget chip, such as a Core i5-12400F. A single-tower air cooler is the best value for a mid-range chip. A dual-tower air cooler is the best value for a hot chip, such as a Core i5-14600K. A 240mm or 360mm AIO is the best choice for the hottest chips and for overclocking — see our best CPUs for overclocking guide. Do not buy a cheap 120mm AIO: it cools worse than a good air cooler and costs more.

Step 4: check the socket and mounting

Check that the cooler fits your socket — AM4, AM5, LGA1700 or LGA1851 — and that it comes with the right mounting hardware. Most modern coolers include brackets for both AMD and Intel, but older stock may not include the newest socket. Also check whether the cooler comes with thermal paste pre-applied or in the box; if not, buy a small tube. Our overclocking basics guide explains why good thermal paste matters, and why a bad application can add 10°C to your temperature.

Step 5: think about noise

Think about noise. A cooler with a large, slow fan is quieter than one with a small, fast fan, and a liquid cooler is quieter at high load because the radiator has more surface area. If your PC sits on your desk, noise matters — read reviews that measure decibels, not just temperature. A Ryzen 7 9800X3D with a quiet air cooler is a pleasant gaming PC; the same chip with a loud cooler is not.

Mistakes to avoid

• Buying a cooler that is too small for your chip.
• Ignoring the case and RAM clearance.
• Buying a cheap 120mm AIO instead of a good air cooler.
• Forgetting to check the socket and the mounting hardware.
• Spending more on the cooler than on the CPU.

The bottom line

The right CPU cooler is the one that matches your chip’s heat, fits your case, and stays quiet — and it usually costs far less than the CPU itself. Do not overthink it: a good air cooler is the right answer for most people, and an AIO is the right answer for the hottest chips. Browse our cooling guides and our overclocking guides for the next steps.