A good CPU cooler keeps your processor cool, quiet, and performing at its best, and the right pick depends on your CPU’s heat output, your case size, and whether you prefer air or liquid cooling. Premium air coolers now rival AIOs, while 240mm and 360mm liquid coolers handle the hottest flagship chips.
Below we rank eight of the best CPU coolers across every tier, led by the premium Noctua NH-D15 and the value Thermalright Peerless Assassin. For budget-focused options see our budget CPU cooler guide, and match it with the right chip from our best CPU and gaming CPU guides.
Top 3 Best CPU Coolers at a Glance
Best CPU Coolers in 2027
| CPU Cooler | Best For | Rating | Price |
|---|---|---|---|
| Noctua NH-D15 | Best Premium Air | 4.8★ | Check Price |
| Thermalright Peerless Assassin 120 SE | Best Value Air | 4.7★ | Check Price |
| CORSAIR Nautilus 360 RS ARGB | Best 360mm AIO | 4.7★ | Check Price |
| Cooler Master MasterLiquid ML240L RGB V2 | Best 240mm AIO | — | Check Price |
| Noctua NH-U12A | Best Compact Premium Air | 4.8★ | Check Price |
| ARCTIC Liquid Freezer 240 | Best AIO Value | 4.5★ | Check Price |
| Cooler Master Hyper 212 Halo ARGB | Best Budget Air | 4.7★ | Check Price |
| Thermalright Assassin X120 Refined SE | Best Ultra-Budget | 4.7★ | Check Price |
1. Noctua NH-D15 – Best Premium Air
- ✓ Cooling that rivals many AIOs
- ✓ Exceptionally quiet operation
- ✓ Legendary build and longevity
- ✗ Very large — check clearance
- ✗ Premium price for air
The Noctua NH-D15 is the best premium air cooler and a long-standing enthusiast favourite, delivering cooling that rivals many liquid coolers with near-silent twin 140mm fans for around $120. With over 13,000 ratings, it is renowned for performance, quiet operation, and years of reliable service.
It is a very large dual-tower cooler so you must check case and RAM clearance, and it costs a premium for air, but for top-tier cooling with no pump to ever fail, it is the one to beat.
Best for: Enthusiasts wanting top air cooling and silence
May not fit: Small cases or those preferring a compact cooler
2. Thermalright Peerless Assassin 120 SE – Best Value Air
- ✓ Near-premium cooling for the price
- ✓ Dual-tower 6-heat-pipe design
- ✓ Outstanding value
- ✗ Large — check clearance
- ✗ May block tall RAM
The Thermalright Peerless Assassin 120 SE is the best value air cooler, a dual-tower six-heat-pipe design that cools almost as well as premium coolers for around $31. With thousands of ratings, it has become the default recommendation for anyone who wants strong cooling without spending much.
It is a large cooler so check case clearance and tall-RAM fit, but for cooling performance per dollar, nothing here comes close.
Best for: Builders wanting near-premium cooling cheaply
May not fit: Small cases or very tall RAM
3. CORSAIR Nautilus 360 RS ARGB – Best 360mm AIO
- ✓ Excellent 360mm cooling headroom
- ✓ Vibrant ARGB fans and pump
- ✓ Handles high-end CPUs with ease
- ✗ Needs a case with 360mm support
- ✗ AIOs carry long-term pump risk
The CORSAIR Nautilus 360 RS ARGB is the best 360mm AIO, offering ample liquid-cooling headroom for even high-end CPUs along with vibrant ARGB fans and pump for around $103. With over 2,400 ratings, it is a strong choice for flagship chips and showcase builds.
It needs a case that supports a 360mm radiator and, like all liquid coolers, carries a small long-term pump-failure risk, but for cooling the hottest CPUs with style, it excels.
Best for: High-end CPUs and showcase builds
May not fit: Small cases or those preferring maintenance-free air
4. Cooler Master MasterLiquid ML240L RGB V2 – Best 240mm AIO
- ✓ Affordable 240mm liquid cooling
- ✓ ARGB pump and fans
- ✓ Over 9,000 positive ratings
- ✗ Needs radiator space
- ✗ Mid-tier for flagship chips
The Cooler Master MasterLiquid ML240L RGB V2 is the best 240mm AIO, bringing affordable liquid cooling with ARGB lighting to mainstream builds for around $80. With over 9,000 ratings, it is one of the most popular all-in-one liquid coolers available.
It needs space for the 240mm radiator and is mid-tier for the hottest flagship chips, but for affordable, good-looking liquid cooling, it is an excellent pick.
Best for: Mainstream builds wanting liquid cooling and RGB
May not fit: Flagship CPUs needing maximum cooling
5. Noctua NH-U12A – Best Compact Premium Air
- ✓ Premium cooling in a smaller size
- ✓ Fits more cases than the NH-D15
- ✓ Quiet, high-quality fans
- ✗ Premium price
- ✗ Slightly behind the NH-D15
The Noctua NH-U12A is the best compact premium air cooler, packing near-NH-D15 cooling into a smaller 158mm single-tower design that fits more cases, with quiet twin 120mm fans, for around $120. With over 2,800 ratings, it is ideal when the NH-D15 is too large.
It is premium-priced and slightly behind the larger NH-D15, but for top-tier air cooling in a more compact package, it is outstanding.
Best for: Builds wanting premium air cooling in less space
May not fit: Budget builds or those with room for a bigger cooler
6. ARCTIC Liquid Freezer 240 – Best AIO Value
- ✓ Class-leading cooling per dollar
- ✓ Extra VRM-cooling fan
- ✓ Broad socket support
- ✗ Plain styling, minimal RGB
- ✗ Needs radiator space
The ARCTIC Liquid Freezer 240 is the best-value AIO, renowned for class-leading cooling performance plus an extra VRM fan that keeps your motherboard cool too, for around $77. ARCTIC’s Liquid Freezer line is a favourite among value-focused builders.
Its styling is plain with minimal RGB and it needs radiator space, but for pure liquid-cooling performance per dollar, it is one of the best AIOs you can buy.
Best for: Builders wanting maximum AIO performance per dollar
May not fit: Those wanting flashy RGB or air simplicity
7. Cooler Master Hyper 212 Halo ARGB – Best Budget Air
- ✓ Reliable, proven design
- ✓ ARGB lighting
- ✓ Easy installation
- ✗ Trails dual-tower coolers
- ✗ Single fan by default
The Cooler Master Hyper 212 Halo ARGB is the best budget air cooler, an updated take on the legendary Hyper 212 with ARGB lighting and dependable single-tower cooling for around $33. It is a proven, easy-to-install choice for mainstream builds.
It trails dual-tower coolers like the Peerless Assassin in raw performance and ships with a single fan, but for reliable, good-looking budget cooling, it is a solid pick.
Best for: Mainstream builds wanting a proven RGB air cooler
May not fit: Those wanting maximum cooling for overclocking
8. Thermalright Assassin X120 Refined SE – Best Ultra-Budget
- ✓ Extremely affordable
- ✓ Solid for mainstream CPUs
- ✓ Easy to install
- ✗ Not for high-end overclocking
- ✗ Single-tower performance
The Thermalright Assassin X120 Refined SE is the best ultra-budget CPU cooler, delivering solid single-tower air cooling for mainstream CPUs at just around $18. It is the most affordable way to get genuinely capable cooling into a build.
It will not handle high-end overclocking like a dual-tower cooler, but for cooling a budget or mid-range CPU on a shoestring, it is unbeatable value.
Best for: The most affordable capable cooler for mainstream CPUs
May not fit: Overclocking or high-wattage flagship chips
How to Choose a CPU Cooler
Air vs liquid (AIO) cooling
Premium air coolers like the Noctua NH-D15 match many AIOs, run maintenance-free, and never risk a pump failure, while AIOs like the ARCTIC Liquid Freezer and CORSAIR Nautilus offer cleaner looks and fit cases where a tall air cooler will not. Choose air for reliability or an AIO for flagship cooling and aesthetics.
Match cooling to your CPU
A cool-running mid-range chip pairs fine with a value air cooler like the Peerless Assassin, while hot flagships like the Core i9-14900K benefit from a 360mm AIO such as the CORSAIR Nautilus. Match the cooler’s capacity to your CPU’s heat output.
Case and RAM clearance
Large air coolers like the NH-D15 can be tall and block RAM, so check your case’s maximum cooler height and RAM clearance, or choose the more compact NH-U12A. AIOs mount the radiator to the case instead, so confirm your case supports a 240mm or 360mm radiator.
Noise and fan quality
Larger coolers run their fans slower at the same temperature, so they are often quieter — Noctua coolers are renowned for near-silent operation. If a quiet PC matters to you, prioritise a large air cooler or a quality AIO with good fans.
Socket compatibility
Confirm the cooler supports your CPU socket — modern coolers here support AM5, AM4, and LGA1700, and some add LGA1851. Check the included mounting kit covers your platform, especially for the latest Intel and AMD sockets.
Frequently Asked Questions
What is the best CPU cooler in 2027?
The Noctua NH-D15 is our overall pick — a premium dual-tower air cooler that rivals many AIOs with near-silent operation for around $120. For value, the Thermalright Peerless Assassin is excellent at around $31, and the CORSAIR Nautilus 360 is the best 360mm AIO.
Is air or liquid cooling better?
Premium air coolers like the Noctua NH-D15 match many AIOs, run maintenance-free, and have no pump to fail, while AIOs offer cleaner looks and better cooling for the hottest flagship chips. For most builds, a quality air cooler is the reliable choice; for flagship CPUs or aesthetics, an AIO shines.
What size AIO do I need?
A 240mm AIO like the ARCTIC Liquid Freezer or ML240L handles mainstream and mid-range CPUs well, while a 360mm AIO like the CORSAIR Nautilus is better for hot flagship chips such as the Core i9-14900K. Match the radiator size to your CPU’s heat and your case support.
Will a big air cooler fit my case?
Not always — large coolers like the Noctua NH-D15 can be tall and block RAM. Check your case’s maximum cooler height and RAM clearance before buying, choose the more compact NH-U12A, or opt for an AIO whose radiator mounts to the case.
Do I need an aftermarket CPU cooler?
If your CPU runs hot, you overclock, or you want a quieter PC, an aftermarket cooler like the Peerless Assassin or NH-D15 runs cooler and quieter than stock coolers and helps sustain performance. For hot flagship chips, a strong cooler is essential.
Final Verdict
For a CPU cooler in 2027, the Noctua NH-D15 is the best premium air pick with near-AIO cooling and silence, while the Thermalright Peerless Assassin is the best value and the CORSAIR Nautilus 360 leads for liquid cooling flagship chips. On a budget, see our budget CPU cooler guide, and match your cooler to the right chip in our best CPU guide.
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