Buying Guide

The Best CPU Coolers for Overclocking

Six large AIO coolers for overclocked CPUs, compared on radiator size, fans, pump and VRM cooling.

By The PC Journal editorial team

12 min read6 products evaluated

Overclocking raises CPU power, and the motherboard's power stages heat up too. Large radiators and a VRM fan help with both.

We compared six AIOs on radiator size, fans, pump and VRM cooling, using the makers' specifications.

Quick Picks

Our 6 recommendations at a glance. Tap a pick for the full verdict.

  1. Best for Overclocking

    ARCTIC Liquid Freezer III Pro 420 A-RGB

    A 420mm radiator and a VRM fan.

    Best for: Cases with 420mm support.

    Our take Check price for ARCTIC Liquid Freezer III Pro 420 A-RGB (opens in a new tab)

  2. Best Premium Pick

    ASUS ROG Ryujin III ARGB Extreme White

    An Asetek Gen8 V2 pump and a VRM fan.

    Best for: Showcase ASUS builds.

    Our take Check price for ASUS ROG Ryujin III ARGB Extreme White (opens in a new tab)

  3. Best High-Speed Fans

    be quiet! Silent Loop 3 360mm

    Silent Wings 4 high-speed fans and Threadripper coverage.

    Best for: Tuners with large CPUs.

    Our take Check price for be quiet! Silent Loop 3 360mm (opens in a new tab)

  4. Best iCUE Pick

    CORSAIR iCUE LINK TITAN II 360 RX RGB

    One-cable wiring with a Gen 2 pump.

    Best for: Corsair ecosystems.

    Our take Check price for CORSAIR iCUE LINK TITAN II 360 RX RGB (opens in a new tab)

  5. Solid Alternative

    ARCTIC Liquid Freezer III Pro 360 A-RGB

    The Liquid Freezer III Pro 360 A-RGB is the lit version of ARCTIC's thick-radiator 360, with the same VRM fan and offset mounting.

    Best for: Buyers who want built-in fan that cools the motherboard's power stages.

    Our take Check price for ARCTIC Liquid Freezer III Pro 360 A-RGB (opens in a new tab)

  6. Worth Considering

    NZXT Kraken Elite 360 RGB White

    The Kraken Elite 360 has a 2.72-inch LCD that can show temperatures, images or GIFs.

    Best for: Buyers who want 2.72-inch ips pump-head display for temperatures or images.

    Our take Check price for NZXT Kraken Elite 360 RGB White (opens in a new tab)

Our Picks

ARCTIC Liquid Freezer III Pro 420 A-RGB

Best for Overclocking1 of 6

ARCTIC Liquid Freezer III Pro 420 A-RGB on Amazon (opens in a new tab)

The Liquid Freezer III Pro 420 uses three 140mm fans on a larger radiator.

Best for

Cases with 420mm support.

Skip if

Skip it if price comes first: the Liquid Freezer III Pro 360 A-RGB cost less when we checked.

Why we like it

Check that your case offers 420mm radiator support. Its 420mm radiator uses 140mm P14 PRO fans, and an integrated VRM fan cools the power stage. A contact frame for LGA1851 and LGA1700 is included.

You also get native offset mounting. Check that your case offers 420mm radiator support at the front or top, and allow for the radiator's thickness plus fans above the motherboard's heatsinks. It supports both AM5 and Intel LGA1851.

Worth noting too: fan cables routed inside the tube sleeving. Its price falls between the Liquid Freezer III Pro 360 A-RGB and the Silent Loop 3 360, based on our last check.

Key dimensions & specs

  • Fan size: 140mm
  • VRM fan: Yes
  • Cabling: Fan cables routed inside the tube sleeving
  • Sockets named: AM5, AM4, LGA1851, LGA1700

Pros

  • Built-in fan that cools the motherboard's power stages
  • Fan cables routed inside the tube sleeving
  • Mounts on both AM5 and Intel LGA1851
  • P14 PRO fans

Cons

  • Costs more than the Liquid Freezer III Pro 360 A-RGB at the time of writing
ASUS ROG Ryujin III ARGB Extreme White

Best Premium Pick2 of 6

ASUS ROG Ryujin III ARGB Extreme White on Amazon (opens in a new tab)

The ROG Ryujin III Extreme White has a 3.5-inch LCD and a fan in the pump housing that cools the VRM area.

Best for

Showcase ASUS builds.

Skip if

Skip it if price comes first: the Liquid Freezer III Pro 360 A-RGB cost less when we checked.

Why we like it

Its 3.5-inch 640x480 screen shows custom GIFs or live readings, and magnet-snap fans speed up installation. Software controls pump and fan speed. It also comes with an Asetek Gen8 V2 pump.

Check that your case offers 360mm radiator support at the front or top, and allow for the radiator's thickness plus fans above the motherboard's heatsinks. It supports both AM5 and Intel LGA1851. Before buying, weigh one limit: costs more than the Liquid Freezer III Pro 360 A-RGB at the time of writing. It was the highest-priced of the 6 picks at the time of writing, so the case for it rests on what it adds over the Kraken Elite 360 and the rest.

Key dimensions & specs

  • Fan size: 120mm
  • Pump display: 3.5-inch
  • VRM fan: Yes
  • Sockets named: AM5, AM4, LGA1851, LGA1700

Pros

  • 3.5-inch pump-head display for temperatures or images
  • Built-in fan that cools the motherboard's power stages
  • Mounts on both AM5 and Intel LGA1851
  • Asetek Gen8 V2 pump

Cons

  • Costs more than the Liquid Freezer III Pro 360 A-RGB at the time of writing
be quiet! Silent Loop 3 360mm

Best High-Speed Fans3 of 6

be quiet! Silent Loop 3 360mm on Amazon (opens in a new tab)

The Silent Loop 3 360 uses three high-speed Silent Wings 4 fans and a dampened pump; its cold plate also covers Threadripper.

Best for

Tuners with large CPUs.

Skip if

Skip it if price comes first: the Liquid Freezer III Pro 360 A-RGB cost less when we checked.

Why we like it

A three-chamber pump reduces turbulence and noise, and three Silent Wings 4 fans are tuned for quiet running. The pump can be dampened and adjusted, which helps if pump noise bothers you at idle. Its engineered cooling block targets high-power CPUs.

Its radiator corners hold the fans flush for quieter airflow. Check that your case offers 360mm radiator support at the front or top, and allow for the radiator's thickness plus fans above the motherboard's heatsinks. It supports both AM5 and Intel LGA1851. On price it sat third of 6, between the cheaper Liquid Freezer III Pro 420 and the pricier Titan II 360 RX, at the time of writing.

Key dimensions & specs

  • Fan size: 120mm
  • Sockets named: AM5, AM4, LGA1851, LGA1700

Pros

  • Mounts on both AM5 and Intel LGA1851
  • Three Silent Wings 4 high-speed fans
  • Dampened, adjustable pump
  • Threadripper cold-plate coverage

Cons

  • Costs more than the Liquid Freezer III Pro 360 A-RGB at the time of writing
CORSAIR iCUE LINK TITAN II 360 RX RGB

Best iCUE Pick4 of 6

CORSAIR iCUE LINK TITAN II 360 RX RGB on Amazon (opens in a new tab)

The Titan II 360 RX moves to a second-generation FlowDrive pump and RX II fans on a unified frame, still on one iCUE LINK cable.

Best for

Corsair ecosystems.

Skip if

Choose another pick if you can't accept this: lighting and display control need iCUE.

Why we like it

iCUE LINK chains all components to one hub port, and the unified fan frame means fewer screws and cables. Check that your case offers 360mm radiator support at the front or top, and allow for the radiator's thickness plus fans above the motherboard's heatsinks. It supports both AM5 and Intel LGA1851. Plan to install iCUE for lighting control; fan and pump speed can also run from the motherboard's headers.

It makes the most sense for corsair ecosystems, since it offers one-cable wiring with a Gen 2 pump. Before buying, weigh one limit: costs more than the Liquid Freezer III Pro 360 A-RGB at the time of writing. It was priced above the Silent Loop 3 360 and below the Kraken Elite 360 at the time of writing.

Key dimensions & specs

  • Fan size: 120mm
  • Cabling: One-cable iCUE LINK hub for pump and fans
  • Software: iCUE
  • Sockets named: AM5, AM4, LGA1851, LGA1700

Pros

  • One-cable iCUE LINK hub for pump and fans
  • Mounts on both AM5 and Intel LGA1851
  • FlowDrive Gen 2 pump
  • RX II fans on a unified frame

Cons

  • Lighting and display control need iCUE
  • Costs more than the Liquid Freezer III Pro 360 A-RGB at the time of writing
ARCTIC Liquid Freezer III Pro 360 A-RGB

Solid Alternative5 of 6

ARCTIC Liquid Freezer III Pro 360 A-RGB on Amazon (opens in a new tab)

The Liquid Freezer III Pro 360 A-RGB is the lit version of ARCTIC's thick-radiator 360, with the same VRM fan and offset mounting.

Best for

Buyers who want built-in fan that cools the motherboard's power stages.

Skip if

Look at the other picks if you need a feature not covered above.

Why we like it

An integrated VRM fan cools the motherboard power stage, and the offset cold plate targets the CPU hotspot. The A-RGB P12 PRO fans add lighting without losing airflow. The contact frame spreads pressure evenly on Intel LGA1851 and LGA1700 chips.

Its fan cables run inside the tube sleeve, so only one cable reaches the motherboard. The P12 PRO fans spin faster than the standard P12 when needed. Check that your case offers 360mm radiator support at the front or top, and allow for the radiator's thickness plus fans above the motherboard's heatsinks.

It supports both AM5 and Intel LGA1851. It was the cheapest of the group when we checked; the Liquid Freezer III Pro 420 was the next step up.

Key dimensions & specs

  • Fan size: 120mm
  • VRM fan: Yes
  • Cabling: Fan cables routed inside the tube sleeving
  • Sockets named: AM5, AM4, LGA1851, LGA1700

Pros

  • Built-in fan that cools the motherboard's power stages
  • Fan cables routed inside the tube sleeving
  • Mounts on both AM5 and Intel LGA1851
  • P12 PRO A-RGB fans
NZXT Kraken Elite 360 RGB White

Worth Considering6 of 6

NZXT Kraken Elite 360 RGB White on Amazon (opens in a new tab)

The Kraken Elite 360 has a 2.72-inch LCD that can show temperatures, images or GIFs.

Best for

Buyers who want 2.72-inch ips pump-head display for temperatures or images.

Skip if

Look at the others if this bothers you: lighting and display control need NZXT CAM.

Why we like it

You pay mainly for the screen. It also offers a 640x640 LCD with a 60Hz refresh rate and a white finish. Check that your case offers 360mm radiator support at the front or top, and allow for the radiator's thickness plus fans above the motherboard's heatsinks.

It supports both AM5 and Intel LGA1851. Plan to install NZXT CAM for lighting and display control; fan and pump speed can also run from the motherboard's headers. Before buying, weigh one limit: costs more than the Liquid Freezer III Pro 360 A-RGB at the time of writing. Its price falls between the Titan II 360 RX and the Ryujin III Extreme White, based on our last check.

Key dimensions & specs

  • Fan size: 120mm
  • Pump display: 2.72-inch IPS
  • Software: NZXT CAM
  • Sockets named: AM5, AM4, LGA1851, LGA1700

Pros

  • 2.72-inch IPS pump-head display for temperatures or images
  • Mounts on both AM5 and Intel LGA1851
  • 640x640 LCD with a 60Hz refresh rate
  • White finish

Cons

  • Lighting and display control need NZXT CAM
  • Costs more than the Liquid Freezer III Pro 360 A-RGB at the time of writing

How We Chose These Coolers for Overclocking

Each pick was assessed across 4 criteria weighted for real-world use.

Setup
We compared cabling, hubs and the software each unit needs.
Extras
We recorded pump displays, VRM fans and zero RPM modes where listed.
Pump and fans
We noted listed pump and fan speeds and fan size.
Fit and mounting
We checked radiator size and listed socket support, including AM5 and LGA1851.

What to Look for in a Cooler for Overclocking

Key buying criteria so you get the right fit the first time.

  1. Match radiator size to the CPU

    A 240mm radiator handles most gaming CPUs. 280mm and 360mm units give more headroom for 170W chips and let fans run slower.

  2. Confirm radiator support in your case

    Cases list which radiator sizes fit at the front, top and side. A top mount also has to clear the motherboard's heatsinks and tall RAM.

    Check the case's clearance figure for radiator plus fans.

  3. AIOs have a finite life

    Pumps and coolant age over years of use. Warranty length is a fair guide to how long the maker expects the unit to last.

  4. Mount the pump below the radiator's top

    Air collects at the highest point of the loop. Keep the radiator's top edge above the pump, or tubes-down at the front, to avoid pump noise and wear.

  5. Software is optional but useful

    LCD screens and lighting usually need the maker's software. Pump and fan speeds can run from motherboard headers instead.

  6. Count the cables and headers

    Some AIOs daisy-chain fans or run everything through one hub; others need several fan headers and a USB header. Check what your motherboard has free.

How to Choose a Cooler for Overclocking

By priority

PriorityConsiderWhy
Cases with 420mm supportLiquid Freezer III Pro 420A 420mm radiator and a VRM fan
Showcase ASUS buildsRyujin III Extreme WhiteAn Asetek Gen8 V2 pump and a VRM fan
Tuners with large CPUsSilent Loop 3 360Silent Wings 4 high-speed fans and Threadripper coverage
Corsair ecosystemsTitan II 360 RXOne-cable wiring with a Gen 2 pump

Scroll sideways to see every column.

Key specs side by side

Figures as each maker states them.

AIO coolerFan sizePump displayVRM fanCabling
Liquid Freezer III Pro 420140mmNot listedYesFan cables routed inside the tube sleeving
Ryujin III Extreme White120mm3.5-inchYesNot listed
Silent Loop 3 360120mmNot listedNot listedNot listed
Titan II 360 RX120mmNot listedNot listedOne-cable iCUE LINK hub for pump and fans
Liquid Freezer III Pro 360 A-RGB120mmNot listedYesFan cables routed inside the tube sleeving
Kraken Elite 360120mm2.72-inch IPSNot listedNot listed

Scroll sideways to see every column.

By price at the time of writing

Prices change often; these tiers reflect Amazon prices when this guide was updated.

Price tierAIO coolers
About $50 to $100Liquid Freezer III Pro 360 A-RGB, Liquid Freezer III Pro 420
About $100 to $150Silent Loop 3 360
About $150 to $250Titan II 360 RX
About $250 to $500Kraken Elite 360, Ryujin III Extreme White

Frequently Asked Questions

Do AIO coolers leak?

Leaks are rare with current sealed units, and several makers cover damage under warranty. Check the terms for your model.

Where do I plug in the pump?

Use the motherboard's AIO_PUMP or CPU_FAN header, set to full speed or DC mode as the maker recommends.

Is an AIO better than an air cooler?

For CPUs rated at 170W or more, a 280mm or 360mm AIO usually runs cooler or quieter. For 65W to 120W chips, a good dual-tower air cooler is often just as effective.

Should the radiator be at the front or top?

Either works. Top-mounted exhausts keep warm air out of the case; front-mounted intake gives the CPU cooler air. Keep the pump below the radiator's top.

Does an AIO need maintenance?

Only dusting the radiator. The loop is sealed and is not meant to be refilled.

Is an LCD pump head worth it?

Only for looks or quick temperature readouts. It does not change cooling performance.

Bottom Line

The Liquid Freezer III Pro 420 is the pick for overclocking if your case fits it. The Ryujin III adds a screen and VRM fan, and the Silent Loop 3 suits Threadripper.