Best CPU Coolers UK 2026: Air vs AIO Liquid Cooling
ir coolers vs AIO liquid - which is actually worth buying in 2026? We cover the best CPU coolers on Amazon UK from the sub-£40 DeepCool AK620 to the Noctua NH-D15 G2 and Arctic Liquid Freezer III 240.
Noctua NH-D15 G2
Top Pick · Air - Dual Tower · Best air cooler available - competes with 280mm AIOs · AM4/AM5/LGA1700/LGA1851
The shortlist
Noctua NH-D15 G2
Top PickDeepCool AK620
Best Budgetbe quiet! Dark Rock Pro 5
Best Black AirArctic Liquid Freezer III 240
Best 240mm AIOCorsair iCUE H150i Elite LCD
Best 360mm AIONZXT Kraken 240
Best Mid AIOProduct links are affiliate links. We may earn a commission at no extra cost to you — it never affects which product wins.
Compare all
| # | Product | Type | Best For | Socket | Where to buy |
|---|---|---|---|---|---|
| 01 |
Noctua NH-D15 G2 Top Pick |
Air - Dual Tower | Best air cooler available - competes with 280mm AIOs | AM4/AM5/LGA1700/LGA1851 | Price — Noctua NH-D15 G2 |
| 02 |
DeepCool AK620 Best Budget |
Air - Dual Tower | Best value cooler in the UK - dual tower under £40 | AM4/AM5/LGA1700/LGA1851 | Price — DeepCool AK620 |
| 03 |
be quiet! Dark Rock Pro 5 Best Black Air |
Air - Dual Tower | Near-Noctua performance in a proper all-black design | AM4/AM5/LGA1700/LGA1851 | Price — be quiet! Dark Rock Pro 5 |
| 04 |
Arctic Liquid Freezer III 240 Best 240mm AIO |
AIO Liquid - 240mm | Outperforms AIOs at twice its price; integrated VRM fan | AM4/AM5/LGA1700/LGA1851 | Price — Arctic Liquid Freezer III 240 |
| 05 |
Corsair iCUE H150i Elite LCD Best 360mm AIO |
AIO Liquid - 360mm | Best sustained thermals for flagship CPUs at full TDP | AM4/AM5/LGA1700/LGA1851 | Price — Corsair iCUE H150i Elite LCD |
| 06 |
NZXT Kraken 240 Best Mid AIO |
AIO Liquid - 240mm | Clean AIO for windowed builds - solid software, reliable pump | AM4/AM5/LGA1700/LGA1851 | Price — NZXT Kraken 240 |
The cooler on top of your CPU is the component most people underspec – and the one most responsible for whether your £350 processor runs at full speed or throttles itself into mediocrity. A stock Intel cooler on a Core i9-14900K is not just inadequate; it is actively destroying the investment you made in that chip. In 2026, the air vs AIO debate has a clearer answer than most reviews let on: the best air coolers match or beat 240mm AIOs on thermals, cost less, and will outlive them. This guide covers when to go air, when an AIO genuinely makes sense, and exactly which cooler to buy at each price point.
We cover the best CPU coolers available on Amazon UK right now – from the sub-£40 DeepCool AK620 that punches well above its price, to the Noctua NH-D15 G2 (the benchmark air cooler and still unbeaten in 2026), to the Arctic Liquid Freezer III 240 and Corsair iCUE H150i for anyone committed to the AIO route. AM4/AM5 and LGA1700/LGA1851 compatibility covers all current Intel and AMD platforms.
Check compatibility before buying: Confirm your CPU socket (LGA1700/LGA1851 for Intel 12th-14th Gen and Arrow Lake; AM4/AM5 for AMD Ryzen 5000/7000/9000) and your case’s CPU cooler height clearance. Most full ATX mid-towers accept up to 160-165mm. Compact mATX and mini-ITX cases often cap at 155mm or less – check the spec sheet before ordering. A 360mm AIO needs three 120mm fan slots; most ATX mid-towers have this on the front or top, but mATX cases frequently do not.
Air vs AIO: The Honest Answer
The air vs AIO question gets more marketing noise than it deserves. Here is the straightforward breakdown based on what each type actually does well in a real build:
Go air if your case has at least 160mm of CPU cooler clearance. A dual-tower air cooler like the NH-D15 G2 or DeepCool AK620 will cool a Ryzen 9 9900X or Core i9-14900K more effectively than any 240mm AIO, and match a quality 280mm AIO at a lower price. Air coolers have no pump to fail, no tubing to develop micro-leaks, and no fans that must be replaced as a matched pair. Individual fan replacement is straightforward and cheap. The noise argument for AIOs is largely marketing – a good dual-tower with quality fans runs quieter than most AIOs under the same thermal load.
Go AIO if aesthetics matter in a windowed build and Noctua’s Khaki/Tan colour scheme is not acceptable to you. A 360mm AIO genuinely outperforms the best air coolers under sustained heavy load – 30-minute Cinebench loops, extended video encoding, sustained 250W+ TDP. AIO also helps in compact cases with low CPU clearance (under 150mm) that still have front radiator space. The catches: the pump will eventually fail (typically 3-7 years), the sealed fluid loop introduces a single point of failure air coolers do not have, and most AIOs require background software that adds Windows overhead.
Under £50: buy air, specifically the DeepCool AK620. Nothing in the AIO market touches it for value. £50-£80: still lean air – the NH-D15 G2 or be quiet! Dark Rock Pro 5 will outperform any 240mm AIO in this price range. Over £80 and committed to liquid: the Arctic Liquid Freezer III 240 is genuinely excellent. Over £120: a 360mm AIO from NZXT or Corsair becomes competitive on sustained performance – but only if you are actually running a flagship CPU under heavy load for extended periods. Most gaming builds simply do not need 360mm cooling.
Best Air Cooler Overall: Noctua NH-D15 G2
The original NH-D15 launched in 2014. Twelve years later, Noctua released the G2 revision – and it is still the benchmark everything else is measured against. That is not nostalgia talking; it is the result of a company iterating one design for a decade rather than chasing a new product line every 18 months. The G2 is not exciting. That is entirely the point.
Top Pick
The NH-D15 G2 uses two asymmetric aluminium towers with six heat pipes, cooled by two 150mm NF-A15 PWM fans. The asymmetric offset design specifically addresses RAM clearance – a long-standing complaint with the original NH-D15 and tall memory kits. At 168mm total height it clears most ATX mid-towers (check your case spec sheet). Performance-wise, it competes directly with 280mm AIOs and beats all 240mm AIOs in sustained multi-core loads – the larger fin surface area dissipates more heat than a 240mm radiator over time. It ships with SecuFirm2+ mounting, LGA1851 bracket included, and Noctua NT-H2 thermal paste. The brown fans divide opinion. Noctua sells chromax.black versions with all-black fans if aesthetics matter to you; expect to pay extra.
- Dual 150mm NF-A15 PWM fans – near-silent under load
- Six heat pipes – sustained thermal performance matches 280mm AIOs
- Asymmetric tower design – significantly improved RAM clearance vs original NH-D15
- Compatible: AM4 / AM5 / LGA1700 / LGA1851
- No pump, no tubes, no software – install once and forget it
- Noctua NT-H2 thermal compound included
Key Specs
Type: Dual tower air
Fans: 2x 150mm NF-A15 PWM
Height: 168mm
TDP Rating: 360W+
Socket: AM4/AM5/LGA1700/LGA1851
Best Air Cooler 2026
Best Budget Air + Best Black Air Cooler
Two more air coolers that deserve your attention – one for anyone who wants maximum performance per pound, one for builds where all-black is non-negotiable.
Best Budget Air
The DeepCool AK620 looks impossible on paper – a dual-tower air cooler with six heat pipes and two 120mm fans for consistently under £40 on Amazon UK. Independent thermal benchmarks put it within 3-5 degrees Celsius of the Noctua NH-D15 G2 on mid-range CPUs like the Ryzen 7 9700X or Core i7-14700K. For any gaming build, that delta is genuinely irrelevant. The gap only widens under sustained 200W+ workloads – video encoding, heavy compilation, 3D rendering – where the NH-D15 G2’s larger fin surface area and better fans pull ahead meaningfully. For gaming at stock speeds, the AK620 is exceptional and the best thermal value available in the UK at its price. It ships with AM5 and LGA1700 mounting hardware, installs cleanly in around 15 minutes, and the all-black colourway works in any build aesthetic without the premium of Noctua’s chromax lineup.
- Dual tower, six heat pipes – genuine competition for coolers at twice the price
- Two 120mm PWM fans – quiet under gaming loads, ramps cleanly at full bore
- Compatible: AM4 / AM5 / LGA1700 / LGA1851
- All-black finish – no colour clashes in any build
- Under £40 – best cooling pound-for-pound in the UK
Key Specs
Type: Dual tower air
Fans: 2x 120mm PWM
Height: 160mm
Socket: AM4/AM5/LGA1700/LGA1851
Price: Under £40
Best Budget Air Cooler
Best Black Air
be quiet! built its reputation on one thing: genuinely quiet fans. The Dark Rock Pro 5 delivers on that reputation – at maximum fan speed it measures around 24.4dB(A), which is quieter than most monitor standby noise. Thermal performance trails the NH-D15 G2 by 2-4 degrees Celsius under sustained load in independent testing, which matters only if you are running a flagship CPU at its thermal ceiling. The real case for the Dark Rock Pro 5 is aesthetic: if your build has a window panel and a dark colour scheme, Noctua’s Khaki/Tan colourway is visually wrong, and the chromax.black version costs noticeably more than the Dark Rock Pro 5. Here you get near-Noctua performance in a proper all-black package. The single-screw centre-mount installation is also simpler than some competing designs, which is a small but genuine quality-of-life win when building under a deadline.
- All-black Silent Wings fans – 24.4dB(A) maximum noise level
- Seven heat pipes – slightly higher heat pipe density than most competing air coolers
- Asymmetric dual-tower layout – good RAM clearance
- 194 fin count – high-density stack for large passive surface area
- Compatible: AM4 / AM5 / LGA1700 / LGA1851
Key Specs
Type: Dual tower air
Fans: 2x 135mm Silent Wings
Height: 162.8mm
Noise: 24.4dB(A) max
Socket: AM4/AM5/LGA1700/LGA1851
Best Black Air Cooler
Best AIO Liquid Coolers UK 2026
If you have decided on liquid cooling – for aesthetics, compact case constraints, or maximum sustained performance with a 360mm radiator – these are the two AIOs worth buying right now.
Best 240mm AIO
The Arctic Liquid Freezer III 240 is arguably the most embarrassing product for other AIO manufacturers. It costs consistently under £70 on Amazon UK, ships with an integrated 40mm VRM fan on the pump head (which actively cools motherboard voltage regulation components – something no other AIO at any price includes as standard), and consistently outperforms AIOs at double its price in independent testing. The 240mm radiator does have a ceiling – sustained 250W+ TDP will push the Liquid Freezer III harder than a 360mm unit. But for any gaming PC, any mid-range productivity workload, and any CPU below flagship-tier sustained TDP, this is the AIO to buy. Arctic’s simpler pump design compared to LCD-heavy competitors also means a better long-term reliability record in the enthusiast community.
- 240mm radiator – fits most ATX mid-towers and many mATX cases
- Integrated 40mm VRM fan on pump head – no competitor at this price includes this
- Arctic P12 PWM fans included – quiet, high static pressure
- Compatible: AM4 / AM5 / LGA1700 / LGA1851
- Under £70 – best performance-per-pound AIO available
Key Specs
Type: 240mm AIO
Fans: 2x 120mm Arctic P12
VRM Fan: 40mm integrated
Socket: AM4/AM5/LGA1700/LGA1851
Price: Under £70
Best Value AIO 2026
Best 360mm AIO
The Corsair iCUE H150i Elite LCD is for builds where you genuinely need 360mm cooling – a Core i9-14900K or Ryzen 9 9950X running all-core boost under sustained workloads, or any overclocked flagship CPU. The LCD display on the pump head shows real-time CPU temperature and clock speed without needing a software widget; it earns its keep in a windowed build. Corsair’s LL120 RGB fans included in the kit are among the best-looking RGB fans available at this price level. The main downside is Corsair iCUE software – it is resource-heavy and has a documented history of causing issues on fresh Windows installs. If that bothers you, the NZXT Kraken Elite 360 runs NZXT CAM which is noticeably lighter. For raw 360mm thermal performance at its price point, the H150i Elite LCD is the benchmark in 2026.
- 360mm radiator – maximum sustained thermal capacity for flagship CPUs
- LCD pump head display – real-time CPU temp and clock without software widgets
- Three LL120 RGB fans included – best-looking AIO fan kit at this price
- Compatible: AM4 / AM5 / LGA1700 / LGA1851
- iCUE software – fully featured but resource-heavy
Key Specs
Type: 360mm AIO
Fans: 3x 120mm LL120 RGB
Head: LCD display
Software: Corsair iCUE
Socket: AM4/AM5/LGA1700/LGA1851
Best 360mm AIO 2026
CPU Cooler Full Comparison 2026
| Cooler | Type | TDP Rating | Noise (Max) | Height / Size | ~UK Price |
|---|---|---|---|---|---|
| Noctua NH-D15 G2 | Air (dual tower) | 360W+ | ~19 dB(A) | 168mm | ~£90-£110 |
| DeepCool AK620 | Air (dual tower) | 260W | ~28 dB(A) | 160mm | ~£35-£45 |
| be quiet! Dark Rock Pro 5 | Air (dual tower) | 350W | 24.4 dB(A) | 162.8mm | ~£70-£90 |
| Arctic Liquid Freezer III 240 | AIO (240mm) | ~250W sustained | ~22 dB(A) | 240mm radiator | ~£55-£70 |
| Corsair iCUE H150i Elite LCD | AIO (360mm) | 350W+ | ~25 dB(A) | 360mm radiator | ~£130-£160 |
| NZXT Kraken 240 | AIO (240mm) | ~230W sustained | ~23 dB(A) | 240mm radiator | ~£80-£100 |
CPU Cooler Pro Tips
Thermal Paste Application Matters More Than Marketing Suggests
The thermal paste pre-applied to most coolers is functional but not optimal. If you are running a high-TDP CPU – Ryzen 9 9900X, Core i9-14900K – switching to Thermal Grizzly Kryonaut or the Noctua NT-H2 that ships with their coolers will typically yield 3-5 degrees Celsius improvement over budget paste. More dramatic is delidding – physically removing the CPU’s integrated heat spreader lid to replace Intel’s notoriously thick factory TIM between the die and lid. This requires care and voids your warranty, but can yield 10-20 degree Celsius drops on Intel K-series chips. For most users, the practical advice is simpler: mount the cooler with even pressure by tightening the four mounting screws in a cross pattern (not clockwise), and make sure the thermal paste is applied as a pea-sized dot in the centre of the IHS – the mounting pressure spreads it correctly.
Case Airflow Matters as Much as the Cooler Itself
A £100 cooler in a case with blocked airflow will perform worse than a £35 cooler in a well-ventilated case. The cooler does not create cold air – it moves heat from the CPU into the case atmosphere. If that atmosphere is already hot because your case has no intakes or a solid front panel trapping heat, the cooler fights uphill and loses. The basic rule: front-facing intake fans pushing air through the case, rear exhaust fan pulling it out, CPU cooler fan blowing toward the rear. For air coolers, verify the fan blows from front to rear, not from case side to case side. For AIOs: mount the radiator as a front or top intake with fans on the room-facing side of the radiator (so cool external air pulls through the fins). Spending another £20 on a decent exhaust fan will often lower CPU temperatures more than doubling your cooler budget.
ECO Mode Reduces Temperatures Without Buying Anything
AMD’s Eco Mode (available in Ryzen Master software or BIOS) reduces processor TDP significantly. A Ryzen 9 9900X running at 65W Eco Mode loses roughly 8-12% of multi-core performance while dropping 30-40 degrees Celsius under load and becoming near-silent on even a modest air cooler. Intel’s Power Limits (PL1 and PL2 settings in BIOS) serve the same purpose on Intel platforms. This is genuinely the best-value thermal upgrade available because it costs nothing and requires no hardware. Before spending £100+ on a cooler upgrade, check whether your CPU’s full sustained TDP is even necessary for how you actually use the machine. Gaming is primarily a single-core and low-thread-count workload – the all-core TDP your processor hits during benchmarks is rarely sustained during real gaming sessions. Eco Mode for gaming is often a pure win: slightly cooler, quieter, no meaningful FPS loss.
AIO Pump Orientation – Install It Wrong and You Will Know
AIO liquid coolers require the pump head to be mounted lower than the radiator, or at minimum at the same height. If the pump head ends up as the highest point in the loop, air bubbles accumulate at the pump and produce an unmistakable rattling or gurgling sound, reduce cooling performance, and accelerate pump wear over time. In most builds this means mounting the radiator at the front or top of the case with tubes routed upward from the CPU block. If you hear intermittent gurgling from your AIO during the first week, this is almost always the cause – check the pump positioning relative to the radiator height and adjust. Running the system under sustained CPU load for 30-60 minutes after repositioning helps migrate any remaining air bubbles out of the pump housing. The sound will stop once the loop is fully purged of air.
CPU Cooler FAQ
Is a £40 air cooler really as good as a £80 AIO?
How long does an AIO liquid cooler last before the pump fails?
Does my CPU come with a cooler – do I need to buy one separately?
240mm vs 280mm vs 360mm AIO – which size should I get?
What CPU temperature is normal under load – when should I worry?
Final Verdict: Best CPU Coolers UK 2026
The right cooler comes down to three things: your CPU’s TDP, your case dimensions, and how much aesthetics matter to you. Here are the top picks by use case:
Noctua NH-D15 G2
The benchmark air cooler in 2026. Beats 240mm AIOs, matches 280mm AIOs, no pump failure risk. Buy it once and forget about cooling entirely.
DeepCool AK620
Sub-£40, dual tower, within 3-5°C of the NH-D15 G2 on gaming loads. The best cooling value available in the UK – there is no AIO at this price that comes close.
Arctic Liquid Freezer III 240
Under £70, integrated VRM fan, outperforms AIOs at double its price. The AIO that other AIO brands would rather you did not notice. If you are going liquid, start here.
Corsair iCUE H150i Elite LCD
360mm, LCD pump head, best sustained thermals for flagship CPUs at full TDP. Only buy this if you are actually running a Core i9 or Ryzen 9 under sustained load – most gaming builds genuinely do not need it.
Bottom line: For most gaming builds, buy the DeepCool AK620 – exceptional value at under £40 and there is no reason to spend more unless you have a flagship CPU at full sustained TDP. Want the absolute best air cooler? The Noctua NH-D15 G2 is still the benchmark. Committed to liquid? The Arctic Liquid Freezer III 240 is the AIO to beat at any price under £100.
The shortlist, monthly
What changed, what dropped in price, and what we would buy now. No spam.
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