# Cooler Master MasterLiquid ATMOS Stealth Liquid CPU Cooler, 120mm Fans, Black

**URL:** https://aio.lv/en/product--oem-556498--12409970
**Data updated:** 2026-05-09 16:16 (EEST)
**Category:** CPU Coolers & PC Cooling Systems
**Manufacturer:** OEM
**Manufacturer code:** 556498
**EAN:** 4719512155141
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 153.99 €
**Prices and availability valid until:** 2026-07-30 23:59
**Price without VAT (21%):** 127.26 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--oem-556498--12409970

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

The Cooler Master MasterLiquid ATMOS Stealth is a high-performance liquid cooling kit featuring 120mm fans with a rotational speed of up to 2400 RPM. It delivers an airflow of 127.6 m³/h and 3.63 mmH2O air pressure, utilizing Loop Dynamic Bearing technology for quiet, efficient operation. Compatible with major Intel and AMD sockets, this black cooling solution ensures optimal thermal management for demanding PC builds.

## Long description

The Cooler Master MasterLiquid ATMOS Stealth is a high-performance liquid cooling kit designed for efficient thermal management in demanding PC builds. This all-in-one solution features a refined dual-chamber pump design that optimizes water flow directly to the CPU hot spot, ensuring reliable cooling performance. The unit comes with pre-installed Mobius 120mm black fans, which are engineered for silent operation and high airflow, simplifying the installation process for the user.
Advantages
This cooling system offers exceptional silence and performance through its advanced Loop Dynamic Bearing technology. The dual-chamber pump design significantly enhances cooling synergy by increasing water pressure. The construction incorporates eco-friendly materials, including recycled plastics for the pump cover and recyclable metals, reflecting a commitment to sustainability. Furthermore, the aesthetic is fully blackout and non-LED, providing a professional and stealthy look for any computer case. The inclusion of tube clips helps organize cables and strengthens the overall setup.
Suitable for
High-performance gaming PCs
Workstations requiring stable thermal management
Users seeking a stealthy, non-RGB aesthetic
Systems using modern Intel or AMD processors
When it may not be suitable
This liquid cooling kit may not be suitable for small form factor cases that cannot accommodate a 120mm fan-based radiator system. Additionally, users who prefer customizable RGB lighting effects may find this non-LED model less appealing for their specific visual requirements.
Key specifications
Fan diameter: 120 mm
Rotational speed: 0 to 2400 RPM
Airflow: 127.6 m³/h
Maximum air pressure: 3.63 mmH2O
Noise level: 30 dB
Bearing type: Loop Dynamic Bearing
Supported sockets: LGA 1150, 1151, 1155, 1156, 1200, 1700, AM4, AM5
How to use
To install the Cooler Master MasterLiquid ATMOS Stealth, first ensure your motherboard socket is compatible with the provided mounting hardware. Secure the pump block onto the CPU using the appropriate brackets, ensuring even pressure. Mount the radiator with the pre-installed fans to the designated area in your PC case. Connect the pump and fan cables to the motherboard headers, using the included tube clips to manage and secure the cabling for a clean build.
What to consider before purchase
Verify your PC case has sufficient space for the radiator dimensions
Check that your motherboard socket is listed in the compatibility list
Ensure your power supply has the necessary headers for pump and fan control
Usage recommendations
For optimal cooling performance, ensure the radiator is mounted in a position that allows for efficient heat dissipation and keep the fan intake clear of obstructions. Regularly check the tube clips to maintain a tidy cable management setup.

## Specifications

### Performance

| Feature | Value |
|---|---|
| Type | Liquid cooling kit |
| Fan diameter | 120 mm |
| Supported processor sockets | Socket AM5, Socket AM4, LGA 1700, LGA 1150 (Socket H3), LGA 1151 (Socket H4), LGA 1155 (Socket H2), LGA 1156 (Socket H), LGA 1200 (Socket H5) |
| Noise level (high speed) | 30 dB |
| Rotational speed (min) | 0 RPM |
| Rotational speed (max) | 2400 RPM |
| Maximum airflow | 75.2 cfm |
| Airflow | 127.6 m³/h |
| Maximum air pressure | 3.63 mmH2O |
| Bearing type | Loop Dynamic Bearing (LDB) |
| Suitable location | Processor |
| Pump motor speed | 3400 RPM |
| Pump noise level | 25 dB |
| Pump's mean time to failure (MTTF) | 210000 h |
| Fan's mean time to failure (MTTF) | 200000 h |

### Design

| Feature | Value |
|---|---|
| Product colour | Black |
| Number of fans | 2 fan(s) |
| Fan connector | 4-pin |
| Radiator material | Aluminum |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 1.338 kg |
| Package weight | 1974 g |
| Package depth | 292 mm |
| Package height | 136 mm |
| Package width | 211 mm |
| Radiator width | 119.2 mm |
| Radiator depth | 277 mm |
| Radiator height | 27.2 mm |
| Fan dimensions (W x D x H) | 120 x 120 x 25 |
| Pump width | 84.9 mm |
| Pump depth | 81 mm |
| Pump height | 53.15 mm |

### Power

| Feature | Value |
|---|---|
| Rated current | 0.18 A |
| Pump voltage | 12 |
| Rated voltage | 12 V |
| Fan power consumption | 2.16 W |
| Pump power consumption | 3.84 W |
| Safety current | 0.35 Ah |

### Other features

| Feature | Value |
|---|---|
| Master (outer) cases per pallet | 4 pc(s) |

### Logistics data

| Feature | Value |
|---|---|
| Master (outer) case height | 310 mm |
| Master (outer) case width | 320 mm |
| Master (outer) case length | 440 mm |

## FAQ

### How much does the Cooler Master MasterLiquid ATMOS Stealth Liquid CPU Cooler cost, and is it available for purchase?

The price is 153.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 7 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 14.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Cooler Master MasterLiquid ATMOS Stealth Liquid CPU Cooler be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All OEM products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized OEM service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: type, fan diameter, weight, supported processor sockets, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

### Where can I download the instructions for Cooler Master MasterLiquid ATMOS Stealth Liquid CPU Cooler?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/12409970/68708357_large.webp