CPU Coolers

CPU cooler buying guide

1) Match cooling to CPU power

• Modern 6 to 8 core CPUs run well on quality tower air or 240 mm AIO

• Higher power chips and heavy creation benefit from large dual tower air or 280 to 360 mm AIO

• Check the cooler maker’s power guidance rather than chasing TDP numbers alone

2) Socket and mounting

• Intel LGA1700 needs the correct backplate or standoffs

• AMD AM5 and AM4 mounts are often included; some reuse the stock backplate

• Threadripper class parts need specific, large baseplate coolers

3) Case and clearance checks

• Cooler height vs case limit in mm for air coolers

• Radiator length and thickness, plus fan thickness for AIOs

• RAM height near the first slot and VRM heatsink clearance

• Top radiator fit can clash with tall motherboard heatsinks. Measure first

4) Fans, noise, and control

• Larger 140 mm fans move more air at lower RPM for less noise

• Use PWM control and set a gentle fan curve for quiet idle, faster under load

• Consider zero RPM modes where available

5) Thermal paste and contact

• Many coolers arrive with pre-applied paste

• If applying your own, use a pea sized dot, seat evenly, and do not overtighten

• Re paste after several years or when swapping coolers

6) AIO specifics

• Connect the pump to a dedicated PUMP header if available, or a constant 100 percent fan header

• Mount the radiator so the hose connections sit below the highest point to keep air out of the pump. Top or front mount with tubes down is ideal, where possible

• Use the 5 V 3 pin ARGB header for lighting if the kit supports it

Quick picks by scenario

• Best value quiet build: Dual fan tower air cooler with 140 mm fans

• Compact Mini ITX: Low profile top down cooler or slim 120 mm AIO

• 1440p gaming and streaming: Dual tower air cooler or 280 mm AIO

• High end creator workstation: 360 mm AIO or premium dual tower air with high static pressure fans

• Silent focused PC: Large tower air cooler with low RPM profile and mesh case airflow

• RGB showcase: 360 mm ARGB AIO with software control, ensuring front or top radiator space

Common mistakes to avoid

• Forgetting to check the case height and radiator clearance before ordering

• Blocking tall RAM with the front fan on a big air cooler

• Leaving the protective film on the cold plate

• Mounting an AIO with the pump as the highest point, which can cause gurgling and wear

• Plugging the pump into a low speed fan header

• Overtightening screws and bowing the motherboard

• Using too much thermal paste, which can spill onto the socket

• Setting aggressive fan curves that are noisy without a real temperature benefit

Care and maintenance

• Dust filters and heatsinks collect fluff. Brush or blow out fins every few months

• Check fan bearings for noise and replace worn fans

• For AIOs, ensure no kinks in tubes and keep radiators free of dust

• Re paste after long service or if temperatures climb without reason

• Keep the case airflow balanced so the cooler breathes cool intake air

Popular sub categories

• Tower air coolers

• Top down and low profile coolers

• 120 mm AIO liquid coolers

• 240 and 280 mm AIO liquid coolers

• 360 and 420 mm AIO liquid coolers

• High static pressure fans 120 and 140 mm

• Thermal paste and cleaning kits

• Mounting kits and brackets for LGA1700 and AM5

FAQs. CPU Coolers

1) Do I need an AIO, or will air cooling be enough
A quality tower air cooler is enough for most CPUs and is simple and reliable. Choose an AIO if you want lower load noise at high power or extra thermal headroom.

2) What cooler fits Intel LGA1700
Look for a cooler that lists LGA1700 support or includes an upgrade kit. Use the supplied backplate and spacers.

3) Will my RAM fit under a big air cooler
Check RAM height and the cooler spec. Many dual tower coolers have a notched fin stack or an adjustable front fan to clear tall RAM.

4) Is a 240 mm AIO better than a dual tower air cooler
Performance is often similar. The best choice depends on case space, noise goals, and budget.

5) How tall can my air cooler be
Match cooler height to your case limit. Many mid towers allow around 165 to 170 mm.

6) Where should I mount a radiator
The top exhaust keeps the GPU heat away from the radiator. Front intake usually gives lower CPU temps. Pick based on your case airflow and space.

7) Which way should fans face on an air cooler
The front fan should pull cool air in through the fins, and the rear fan should push towards the back exhaust. Follow the arrows on the fan frame.

8) How much thermal paste should I use
A small pea sized dot in the centre is enough. The pressure spreads it evenly.

9) Do AIOs need maintenance
No fluid refills. Keep dust off the radiator and ensure the pump has constant power. Replace after many years if performance fades.

10) My AIO makes a bubbling noise. What now
Air may have reached the pump. Re mount so the pump is below the highest part of the loop and let it run to purge micro bubbles.

11) Can I reuse an old cooler on a new platform
Often, yes, with a mounting kit for the new socket. Check the maker for LGA1700 or AM5 kits.

12) Are 140 mm fans better than 120 mm
At the same airflow, 140 mm fans are usually quieter because they spin slower. Use what your case and cooler support.

13) Will a cooler improve gaming frame rates
It improves sustained boost clocks and noise, not raw FPS. It keeps the CPU from throttling.

14) What is a pump header, and do I need one
Many boards have a PUMP or AIO_PUMP header that provides constant power for AIO pumps. Use this if available.

15) Is liquid cooling risky
Reputable AIOs are very reliable. Fit carefully, do not overtighten, and check for clearance. Warranty covers the unit for the stated term.

16) How do I set a quiet fan curve
In BIOS or software, set a gentle slope up to 60 to 70 C, then a steeper ramp. Test under load and tune for comfort.

17) Does mounting orientation matter for air coolers
Yes. Horizontal airflow front to back usually aligns best with case fans. Avoid blowing down into a solid front panel.

18) Why are my CPU temps high after install
Possible causes include too much or too little paste, loose mounting, fans not spinning, or blocked airflow. Reseat and retest.

19) Do I need new paste every time I remove the cooler
Yes. Clean both surfaces with isopropyl alcohol and apply fresh paste.

20) What warranty do CPU coolers have
Air coolers often include 3 to 6 years warranty. AIOs commonly include 3 to 5 years. See the product page for the exact cover.

Ready to cool your build

Explore CPU Coolers across tower air, top down, and AIO liquid options in 120, 240, 280, 360, and 420 mm. With clear fit notes, thermal paste, fans, and mounting kits, plus trusted UK service since 1988, you can install with confidence and enjoy cooler, quieter performance.

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