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Thermalright Assassin X 120R Digital ARGB Black specifications and in-depth review

Thermalright Assassin X 120R Digital ARGB Black

Manufacturer: Thermalright

The Thermalright Assassin X 120R Digital ARGB Black is an air-cooled CPU cooler designed for a broad range of desktop platforms. It features ARGB lighting and ships with thermal paste included, making it a straightforward option for builders looking to keep the installation process simple. The unit weighs 880 g and carries a 2-year warranty.

On the technical side, the cooler houses a single fan capable of spinning up to 2000 RPM while delivering a maximum airflow of 70.84 CFM. Noise output ranges from 16 dB at its quietest to 29.8 dB at full speed, and the fan runs on fluid dynamic bearings. The heatsink measures 151 mm tall, 46 mm wide, and 120 mm deep. Socket compatibility covers Intel LGA 1150, 1151, 1155, 1200, 1700, and 1851, as well as AMD AM4 and AM5 platforms.

Pros
  • Supports a wide range of CPU sockets, covering six Intel LGA platforms as well as AMD AM4 and AM5
  • Fluid dynamic bearings on the fan contribute to smoother rotation and longer bearing lifespan
  • RGB lighting is built in, allowing for visual customization without needing additional components
  • Thermal paste is included in the box, so the cooler is ready to install without extra accessories
  • Noise output starts as low as 16 dB, making it relatively quiet during light workloads
Cons
  • At 151 mm tall, the heatsink may not fit in compact or low-profile cases
  • Only a single fan is included, offering no redundancy or push-pull airflow configuration
  • The warranty period is limited to 2 years, which is shorter than some alternatives in this category
  • No built-in display, so there is no way to read temperatures or status information directly from the unit
Who is this for?

This cooler is a practical choice for users building systems in standard mid-tower or full-tower cases where vertical clearance is not a concern. Its broad socket support across both Intel and AMD platforms makes it well-suited for builders who frequently work with a variety of systems or plan future platform upgrades. The inclusion of RGB lighting and bundled thermal paste also makes it a convenient option for first-time builders or those putting together a visually themed rig without sourcing extra components. With a minimum noise level of 16 dB, it also fits reasonably well in quiet home or office desktop builds running moderate workloads.

Who is this NOT for?

Users working with compact or small-form-factor cases may find the 151 mm heatsink height incompatible with their chassis clearance limits. The single-fan configuration also makes this cooler less appropriate for high thermal-load scenarios where a push-pull setup or more aggressive airflow would be needed to maintain stable temperatures. Additionally, users who want direct on-device feedback will find it lacking, as there is no built-in display for monitoring temperatures or system status at a glance.

Cooling:

Cooling type Air
Max fan RPM 2000 rpm
Max airflow 70.84 CFM
Number of fans 1

This cooler uses air cooling as its thermal dissipation method and is equipped with a single fan. That fan spins at up to 2000 RPM, generating a maximum airflow of 70.84 CFM to move heat away from the heatsink.

Dimensions:

Heatsink/water block height 151 mm
Heatsink/water block width 46 mm
Heatsink/water block depth 120 mm

The heatsink stands 151 mm tall and measures 46 mm in width and 120 mm in depth, giving a clear picture of the physical space it occupies inside a chassis.

General info:

CPU socket LGA 1155, LGA 1151, LGA 1150, LGA 1200, LGA 1700, LGA 1851, AM4, AM5
Audible noise (min) 16 dB
Audible noise (max) 29.8 dB
weight 880 g
warranty period 2 years

This cooler is compatible with a wide range of sockets, covering Intel LGA 1150, 1151, 1155, 1200, 1700, and 1851 as well as AMD AM4 and AM5 platforms. Noise output sits between 16 dB at its lowest and 29.8 dB at full load, keeping acoustic output relatively controlled across its operating range. The unit weighs 880 g and is backed by a 2-year warranty.

Features:

Fan bearings Fluid dynamic bearings
has RGB lighting ✓
Thermal paste Included
Has a display ✕

The fan runs on fluid dynamic bearings, which generally contribute to smoother and quieter operation over the fan's lifespan. RGB lighting is included, adding visual customization to the build, while thermal paste comes in the box, removing the need for a separate purchase before installation. The cooler does not feature a built-in display.

Final Verdict

The Thermalright Assassin X 120R Digital ARGB Black is a straightforward air CPU cooler that covers the essentials well for mainstream desktop builds. Its broad platform compatibility across eight Intel and AMD sockets makes it a versatile choice for a wide range of systems, and the inclusion of ARGB lighting alongside bundled thermal paste adds practical convenience for builders. The cooler's acoustic range is reasonable for everyday use, though its single-fan setup and 151 mm heatsink height do place some natural limits on who can use it effectively. Overall, it is a capable and uncomplicated option for builders prioritizing socket flexibility and ease of installation in standard-sized cases.