Collection: CPU Cooling

Which CPU cooling do you actually need?

Most PC builders overthink this one. The real question is how many watts your chip will sustain and how much noise you'll tolerate to remove them. Entry-level coolers, like a single-tower air cooler with four heatpipes and a 120mm fan (think Thermalright Assassin Spirit or DeepCool AK400), comfortably handle chips drawing around 100 to 150W. That covers most Ryzen 5 and Core Ultra 5 parts, and the X3D chips in particular, which sip power compared with their performance.

The sweet spot is where heat transfer and noise balance out. Dual-tower air coolers like the Thermalright Peerless Assassin 120 or DeepCool AK620 use more heatpipes and a larger fin area, so the fan can spin slower for the same temperature. A 240mm or 280mm AIO such as the Arctic Liquid Freezer series does the same job differently. It moves heat through a copper cold plate and coolant to a radiator that can sit away from the socket. For chips pulling 200W or more, this tier keeps temperatures sane without a screaming fan curve.

Enthusiast gear is mostly the same engineering with a bigger radiator and extra features. A 360mm AIO has about 30 to 40 percent more radiator surface than a 280mm, which lets fans run slower. But gains are typically only a few degrees. Pump speed, cold plate quality and fan static pressure matter more than the LCD screen on the pump head. Diminishing returns start at around 280mm for most builds. Paying more mainly buys acoustics, aesthetics and headroom for a hot flagship chip.

Upgrading and technical nuances

Mounting compatibility is generally friendly today. AM5 kept the AM4 mounting hole spacing, so most older AMD brackets still work. Intel's LGA1851 platform shares its cooler mounting pattern with LGA1700, so a cooler from a previous Intel build usually carries over. Always check the manufacturer's compatibility list anyway, because retention hardware and backplates vary.

Heat behaves differently between platforms. Ryzen chips are designed to boost until they hit a thermal target, so a high reading under load doesn't always mean a poor cooler. Core Ultra chips can pull serious power in multicore work, and that's where a quality 280mm or 360mm AIO earns its keep. If you're gaming on an X3D chip, a Peerless Assassin class air cooler is usually plenty, and spending AIO money there is often wasted. Browse CPUs & Processors first and match the cooler to the chip's real power draw.

Fan design matters too. Airflow-focused fans move lots of air through open space. Static pressure fans push through dense fins and radiators. Bearings are a lifespan trade-off. Fluid dynamic bearings (FDB) stay quiet for years, while cheap sleeve bearings tend to get noisy as they wear. Noctua's NH-D15 G2 and Arctic's P-series fans are good examples of strong fan engineering at different price points.

For a quick overview of what's out there, the Fans, Heatsinks & Cooling collection is a good place to compare air and liquid options side by side.

Practical things to check before you buy

Start with clearance. Tall dual-tower coolers can run 155mm or more, and plenty of mid-tower side panels won't close over them. Check the cooler height limit in the specs for your Computer Cases before you commit. Big towers can also overhang your RAM slots, so pair them with low-profile modules from Desktop Memory if the fit is tight.

For AIOs, check radiator support on your case's top and front mounts, including thickness and any fan or tubing clearance against the motherboard. A radiator mounted at the top should ideally keep the pump below the highest point of the loop, to avoid trapped air making pump noise. Remember that an AIO doesn't blow air across the motherboard VRMs the way a tower fan does, so make sure the case still has decent airflow around the socket area.

Cabling is the other trap. Pumps need a dedicated header on your Motherboards, usually AIO_PUMP or a spare high-current fan header, and LCD or RGB models often want a USB 2.0 header and sometimes SATA power. Count your headers and sort out any splitters or extensions from Cables & Connectors before the box arrives. A cooler that can't be wired properly is a headache on build day.

Don't forget the rest of the thermal picture. A high-end card from Graphics Cards / GPU dumps hundreds of watts into your case, and a CPU cooler can only do so much if intake air is already warm. Strong front intake and a clear exhaust path often drop CPU temperatures more than upgrading the cooler itself.

Brands and local warranty

Reliable names in this category include Thermalright, Noctua, Arctic, DeepCool, be quiet!, Corsair, NZXT, Lian Li and Cooler Master. Thermalright and Arctic have strong value credentials. Noctua is the premium air-cooling benchmark, while Corsair, NZXT and Lian Li lean towards polished AIOs with more software and lighting features.

Warranty matters more with liquid cooling, because pumps can fail and leaks, though rare, do happen. Australian Consumer Law gives you rights against faulty goods, but genuine local stock makes the process far smoother. Buying from an Australian retailer means you deal with a local distributor, not an overseas seller, if you need a replacement. Keep your invoice, register the product where required, and avoid grey imports that may not be honoured locally.

Frequently asked questions

Is an AIO better than air cooling?

Not automatically. A good dual-tower air cooler can match a 240mm AIO in temperature and noise, with no pump to fail. AIOs shine on hot, high-wattage chips, in compact cases where a tower won't fit, and when you want a cleaner look around the RAM and socket.

Do I need a 360mm radiator?

Only if you're running a power-hungry chip under sustained loads, such as rendering or heavy multicore work. For gaming and general use, a 240mm or 280mm AIO or a quality air cooler is usually enough, and quieter than you'd expect.

Will my old cooler fit a new platform?

Often yes, especially AM4 coolers on AM5 and LGA1700 coolers on LGA1851. Check the manufacturer's compatibility list and make sure you have the correct brackets, because some older kits need an updated mounting bar or backplate.

Do I need to replace the thermal paste?

Most coolers ship with pre-applied or included paste that works fine. Upgrading to a premium paste may gain a degree or two, but correct mounting pressure and a good contact pattern matter far more. If you remove a cooler, clean the surfaces and reapply fresh paste.

How long do AIO coolers last?

Most are built to run for five years or more, but pumps and coolant gradually degrade. Warranty length is a decent indicator of confidence. If the pump gets noisy or temperatures creep up over time, it's usually time to claim warranty or replace the unit.