Cooler Master Master Liquid 360 Atmos Review: Performance and Attention to Detail

Its performance is among the best we’ve ever tested.

Cooler Master Master Liquid 360 Atmos
Editor's Choice
(Image: © Tom's Hardware)

Tom's Hardware Verdict

The 360 Atmos is the best AIO that Cooler Master has made – so far. It offers premium aesthetics, strong cooling performance, and quiet noise levels for $149.


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    Extremely strong performance

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    Low noise levels in common workloads

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    Reasonable $149.99 USD MSRP


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    Noise levels vary slightly at full speed

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Cooler Master has had a busy summer, updating it’s ample lineup of cooling products. Earlier this summer we examined the MA824 and Hyper 622 Halo, both providing improvements and innovation to the air cooling market.

But shifting to the liquid cooling realm, today we have Cooler Master’s latest high end 360mm AIO, the MasterLiquid 360 Atmos, on our test bench. This is Cooler Master’s most premium AIO, designed from the ground up with attention to every detail in order to provide the best performance and user experience on the market.   

Does the 360 Atmos AIO have what it takes to best tough competition like Lian Li's Galahad II Performance 360 and earn a spot on our best AIO coolers list? We’ll have to put it through our performance testing to find out. But first, here are the cooler’s specifications, direct from Cooler Master.


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CoolerCooler Master MasterLiquid 360 Atmos
Radiator MaterialAluminum
Pump SpeedUp to 3200 RPM
Pump MTTF>210,000 hours
Socket CompatibilityIntel Socket LGA 115x/1200/1700 AMD AM5 / AM4
Max TDP (Our Testing)~250W on Intel i7-13700K
Installed Size (with fans)394mm (L) x 119.6 mm (W) x 52.2mm (D)
Warranty5 years

Packing and Included Contents 

The packaging of Cooler Master’s 360 Atmos deserves special mention. This is one of the classiest packages I have seen from any cooler. When you open the box, you’ll find the cooler neatly tucked and protected with molded cardboard and plastic peel and fans already installed to the radiator for convenience. All necessary parts for installation on AMD and Intel systems are neatly organized in three accessory boxes.

(Image credit: Tom's Hardware)

In addition to packaging the contents, the boxes also serve as instruction manuals with easy-to-understand instructions printed on the sides. Alternatively, a QR code provides a link to a PDF version of the manual. This is at least a better alternative than MSI's MAG CoreLiquid E360, which lacks any kind of printed installation manual at all.

Included in Cooler Master's box are the following:

  • Three Sickleflow Edge 120 fans, pre-installed
  • 360mm radiator 
  • CryoFuze Thermal paste and application tools
  • PWM splitter cord
  • ARGB splitter cord
  • ARGB hub
  • Mounts for all modern CPU sockets (including AM5 & LGA1700)
  • Cable Management clips

LGA 1700 Cooler Installation 

Installation of the 360 Atmos is easy on Intel LGA 1700 systems. 

1. I would advise securing the radiator prior to other installation steps. It generally makes the rest of installation easier – unless perhaps you are building in a space-constrained SFF case. 

2. Intel users should begin by pressing the backplate against the motherboard and securing it by screwing in the mounting standoffs from the front side of the motherboard.

(Image credit: Tom's Hardware)

3. Next you’ll need to apply thermal paste to the CPU – and if you're unsure how to do that, see our How to Apply Thermal Paste primer. Cooler Master includes a 5-point applicator which can be optionally used to assist with ideal application. 

4. Place the CPU block against the mounting bars, then secure it with the included thumbscrews.

(Image credit: Tom's Hardware)

5. Connect the PWM and ARGB headers, and don’t forget to take off the plastic peel before turning on your computer.  

(Image credit: Tom's Hardware)

Features of Cooler Master’s MasterLiquid 360 Atmos

⋇ Copper contact plate

(Image credit: Tom's Hardware)

The 360 Atmos includes a large copper CPU contact plate. It includes a 5-point thermal paste stencil tool to assist with thermal paste application. 

⋇ Full RAM compatibility

As the CPU block does not impede or overhang the DIMM slots on a motherboard, all sizes of RAM – no matter how tall – are compatible with this cooler.

Cooler Master Master Liquid 360 Atmos

(Image credit: Tom's Hardware)

⋇ 27mm-thick radiator 

The 360 Atmos includes a radiator 27mm thick. With fans installed, the thickness is a total of 52mm.

(Image credit: Tom's Hardware)

⋇ 3x 120mm Sickleflow Edge fans 

There’s more to a cooler than just the heatsink or radiator. The bundled fans have a significant impact on cooling and noise levels, as well as how the cooler looks in your case. Cooler Master includes its latest Sickleflow Edge fans with the 360 Atmos. Many competing fans are rated for as little as 40,000 hours, but Cooler Master indicates it’s confidence with the quality of its fans with a rated lifespan of over 160,000 hours. 

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ModelSickleflow Edge
Dimensions120 x 120 x 25mm
Fan Speed690- 2500RPM ± 10%
Air FlowUp to 70.7 CFM
Air PressureUp to 3.61 mmH2O
Bearing TypeLoop Dynamic Bearing
MFFT>160,000 hours

⋇ (Optional) MasterPlus software control

Manufacturers of AIO coolers tend to fall into one of two extremes when it comes to cooler control: Either they force you to use bloated software to control the device, or they don’t include any software and make you rely only on motherboard PWM and ARGB controls. 

With Cooler Master, you have a choice. You can use the default motherboard controls if you prefer, but the company also offers optional MasterPlus software for a more customized experience. 

Cooler Master’s software provides the ability to control and customize your AIO cooler – but that’s not where it ends. It can also notify you of leaks, potentially averting a disaster. The company promises more feature updates to its software are coming in the not-too-distant future, with the help of an API, which will hopefully allow the software to control many other products.

LGA1700 Socket Bending

There are many factors other than the CPU cooler that can influence your cooling performance, including the case you use and the fans installed in it. A system's motherboard can also influence this, especially if it suffers from bending, which results in poor cooler contact with the CPU. 

In order to prevent bending from impacting our cooling results, we’ve installed Thermalright’s LGA 1700 contact frame into our testing rig. If your motherboard is affected by bending, your thermal results will be worse than those shown below. Not all motherboards are affected equally by this issue. I tested Raptor Lake CPUs in two motherboards. And while one of them showed significant thermal improvements after installing Thermalright’s LGA1700 contact frame, the other motherboard showed no difference in temperatures whatsoever! Check out our review of the contact frame for more information.

Testing Methodology

Today's highest-end CPUs, whether Intel or AMD, are difficult to cool in intensive workloads. In the past. reaching 95 degrees Celsius or more on a desktop CPU might have been a cause for concern. But with today’s top-end CPUs, this is considered normal operation. Similar behavior has been present in laptops for years due to cooling limitations in tight spaces.

All testing is performed with a 23C ambient room temperature. Multiple thermal tests are run on each CPU to test the cooler in a variety of conditions, and acoustic measurements are taken with each result. These tests include:

1. Noise normalized testing at low noise levels

2. “Out of the box”/Default Configuration Thermal & Acoustics Testing

     a.) No power limits enforced

     b.) Because CPUs hit Tjmax in this scenario, the best way to compare cooling strength is by recording the total CPU package power consumption.

3. Thermal & Acoustics testing in Power Limited Scenarios

     a.) Power limited to 175W to emulate a medium intensity workload

     b.) Power limited to 125W to emulate a low intensity workload

The thermal results included are for a 10-minute testing runs. To be sure that was sufficiently long to tax the cooler, we tested both Thermalright’s Assassin X 120 R SE and DeepCool’s LT720 with a 30-minute Cinebench test with Intel’s i9-13900K for both 10 minutes and 30 minutes. The results didn’t change much at all with the longer test: The average clock speeds maintained dropped by 29 MHz on DeepCool’s LT720 and 31 MHz on Thermalright’s Assassin X 120 R SE. That’s an incredibly small 0.6% difference in clock speeds maintained, a margin of error difference that tells us that the 10-minute tests are indeed long enough to properly test the coolers.

Testing Configuration – Intel LGA1700 Platform

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CPUIntel Core i7-13700KRow 0 - Cell 2
MotherboardMSI Z690 A Pro DDR4 Row 1 - Cell 2
CaseBe Quiet! Silent Base 802, system fans set to speed 1 setting. Row 2 - Cell 2
MonitorLG 45GR95QERow 3 - Cell 2
PSUCooler Master XG Plus 850 Platinum PSURow 4 - Cell 2
Albert Thomas
Freelancer, CPU Cooling Reviewer

Albert Thomas is a contributor for Tom’s Hardware, primarily covering CPU cooling reviews.