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Cooler Master Atmos II Stealth 360 AIO Liquid CPU Cooler, Thicker Radiator, AMD AM5/AM4 & Intel LGA1851/1700 Support Cooler, 360mm, VRM Cooling Fan, Mobius 120P Fan Cybenetics AF Titanium SP Platinum
- Dedicated VRM Cooling: Six-direction airflow helps cool motherboard power components, lowering VRM temperatures by up to 10.2C for improved stability.
- 29mm Thick Radiator: Thicker radiator design increases heat dissipation for lower CPU temperatures and stable cooling.
- Mobius 120P Fan: High static pressure and up to 190 CFM airflow push more air through the radiator while keeping operation quiet.
- Patented Dual-Chamber Pump: Up to 3,400 RPM helps move coolant directly to CPU hot spots for faster heat transfer and consistent cooling.
- Built To Last: Industrial-grade EPDM tubing helps reduce coolant loss over time.
- Advanced Copper Cold Plate: Ultra-thin fins and optimized microchannels help move heat away from the CPU faster for efficient cooling.
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Overview
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Reviews (2)
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Warranty & Returns
Warranty, Returns, And Additional Information
Warranty
- Limited Warranty period (parts): 2 years
- Limited Warranty period (labor): 2 years
- Read full details
Return Policies
- Return for refund until: January 31, 2026
- Return for replacement until: January 31, 2026
- This item is covered by Newegg.com's Extended Holiday Return Policy.
- Read full return policy for details.
We want to ensure your holiday shopping this year is hassle-free. That’s why we’re automatically extending our return policies on almost every product! For purchases placed between November 1st, 2025 and December 31, 2025 you will have until January 31, 2026 to return your product.
Manufacturer Contact Info
- Manufacturer Product Page
- Manufacturer Website
- Support Phone: 1-888-624-5099
- Support Email: customersupport@coolermaster.com
- Support Website
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The Cooler Master Atmos II Stealth 360 is a 360mm all-in-one liquid CPU cooler with a 29mm-thick radiator, three Mobius 120P fans, and a 3,400 RPM dual-chamber pump, suited to builders seeking strong CPU cooling and dedicated VRM airflow in a compatible case.
Recommended For
- Builders running a heat-intensive CPU for long gaming sessions or sustained workstation tasks who want a 360 mm liquid cooler; a review tested this model with a Core i9-13900K during gaming workloads.
- People building a dark, understated PC who prefer a non-LED cooler over illuminated pump or fan effects; Cooler Master positions the Stealth model as an all-black, non-LED design.
- Builders using an AIO who want added airflow around motherboard power components near the CPU socket; the included VRM-fan module is intended to direct air across that area.
- PC builders with a case that supports a 360 mm radiator and a compatible AM4, AM5, or listed Intel socket who want preinstalled radiator fans and a bundled liquid-cooling setup.
Real-World Use Scenarios
- During long gaming sessions on a high-wattage CPU, the 360mm AIO helps carry CPU heat away; one review reported lower gaming temperatures after replacing a dual-fan liquid cooler, though results depend on the CPU, case airflow, and room temperature.
- For sustained CPU-heavy work or stress testing, such as rendering or compiling, it provides liquid cooling for prolonged heat loads; a review also tested the cooler under Prime95 load and with an overclocked CPU.
- In a build where the motherboard’s power components get little airflow, the included VRM fan directs air around the CPU socket to help cool those components during demanding workloads.
- When building a black, non-RGB PC, the Stealth’s unlit design fits a restrained look while providing CPU cooling without adding radiator-fan lighting.
- For a new AM5 or supported Intel build, it offers a compatible AIO option across the listed sockets; check that the case has room for a 360mm radiator before buying.
Spec Summary
| Attribute | Value |
|---|---|
| Best For | AIO water-and-fan cooling for desktop CPUs using the listed AMD and Intel sockets |
| Cooling System And Compatibility | AIO liquid cooler compatible with AMD AM4 and AM5 and Intel LGA 1150, 1151, 1155, 1156, 1200, 1700, and 1851 sockets |
| Pump | 3400 ± 300 RPM pump speed with maximum noise of 25 dBA |
| Radiator | 394 mm aluminum radiator |
| Fans | Three 120 mm fan slots, with fan speeds of 690–2500 RPM ± 15%, airflow up to 190 CFM, loop dynamic bearings, and a 7-pin connector |
| Tubing | 400 mm tubing |
| Appearance And Weight | Black, non-LED design; item weight 3.7 lb |
| Model Identifiers | Cooler Master MasterLiquid, model/part number MLX-D36M-A24DK-R1 |