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Thermalright Assassin X 120R Digital ARGB Black CPU Cooler vs Noctua NH-L12S

Updated August 2026The Thermalright Assassin X 120R offers great value for budget-conscious users, while the Noctua NH-L12S excels in premium quality and quiet operation.

The Thermalright Assassin X 120R offers great value for budget-conscious users, while the Noctua NH-L12S excels in premium quality and quiet operation.

Why Thermalright Assassin X 120R Digital ARGB Black CPU Cooler is better

lower price

C$32.90 vs C$87.95

ARGB lighting

offers vibrant visual effects

height compatibility

151mm height fits most cases

Why Noctua NH-L12S is better

premium quality

renowned for excellent craftsmanship

quiet operation

ultra-quiet with Low-Noise Adaptor

thermal paste included

comes with high-end NT-H1 thermal paste

Overall score

Thermalright Assassin X 120R Digital ARGB Black CPU Cooler
65
Noctua NH-L12S
85

Specifications

SpecThermalright Assassin X 120R Digital ARGB Black CPU CoolerNoctua NH-L12S
Fan Speed2000 RPMN/A
Noise Level29.8 dB(A)N/A
CompatibilityIntel/AMDIntel/AMD
Installationeasy kitSecuFirm2 system
Target Audiencebudget gamersenthusiasts

Dimension comparison

Thermalright Assassin X 120R Digital ARGB Black CPU CoolerNoctua NH-L12S

Overview of the Thermalright Assassin X 120R Digital ARGB Black and Noctua NH-L12S

The Thermalright Assassin X 120R Digital ARGB Black CPU Cooler is priced at C$32.90, whereas the Noctua NH-L12S comes at a significantly higher price of C$87.95. This price difference highlights the varying target audiences for each product, with the Thermalright cooler appealing to budget-conscious consumers and the Noctua cooler directed towards enthusiasts seeking premium quality.

The Thermalright model features a height of 151mm, which allows for robust heat dissipation while maintaining compatibility with most cases. In contrast, the Noctua NH-L12S is designed as a low-profile solution with a total height of just 70mm, making it particularly suitable for compact builds such as ITX and HTPC systems. This fundamental structural difference is crucial for users with specific case size limitations.

Cooling Performance

In terms of cooling performance, the Thermalright Assassin X boasts an air volume of 70.84 CFM and a fan speed of 2000 RPM, which helps achieve efficient heat dissipation. This cooler operates with a noise level of 29.8dB (A), ensuring that it remains relatively quiet during operation.

On the other hand, Noctua's NH-L12S utilises a highly optimised NF-A12x15 120mm fan, which also supports PWM for automatic speed control. While specific air volume and RPM values are not provided for the Noctua cooler, it is renowned for its ultra-quiet operation, especially when paired with the included Low-Noise Adaptor. This makes the Noctua a compelling choice for users prioritising a quiet computing environment.

Installation and Compatibility

The Thermalright Assassin X is designed with wide compatibility, supporting dual platform sockets for both Intel and AMD processors, including Intel LGA 1851/1700/1150/1151/1155/1156/1200 and AMD AM4/AM5. The installation is facilitated through a simple accessory kit, and users may refer to an installation video or manual for guidance.

Conversely, the Noctua NH-L12S features the SecuFirm2 mounting system, which is also straightforward and supports Intel LGA1851, LGA1700, LGA1200, LGA115x, and AMD AM5 & AM4. This efficient mounting system is designed for easy installation, especially for users who may be less experienced with CPU cooler setups. The offset mounting option offered by Noctua further enhances compatibility and efficiency.

Aesthetic Appeal

Aesthetic considerations differ significantly between these two coolers. The Thermalright Assassin X incorporates ARGB lighting, allowing for vibrant visual effects that can synchronise with a motherboard's 5V 3-pin for a cohesive look. This feature makes it an attractive option for gamers and PC builders focused on aesthetics.

In contrast, the Noctua NH-L12S adopts a more utilitarian design, prioritising function over form. While it lacks elaborate lighting features, Noctua's reputation for premium quality and craftsmanship adds to its appeal. Users who prefer a more understated look without compromising on performance may find the Noctua to be a better fit.

Thermal Paste and Accessories

When it comes to thermal applications, the Thermalright Assassin X does not specify the inclusion of thermal paste, which could be a consideration for some buyers. However, the cooler's design and features suggest that it is optimally built for efficient heat transfer.

The Noctua NH-L12S comes with high-end NT-H1 thermal paste, which is known for its excellent thermal conductivity. This inclusion adds value, especially for users looking for a complete package that ensures optimal performance right out of the box. This focus on quality thermal interface material may appeal to users aiming for the best cooling efficiency possible.

Target Audience

The Thermalright Assassin X is well-suited for budget-conscious gamers and users who want a visually appealing cooler without breaking the bank. Its competitive pricing and performance make it an attractive choice for those building or upgrading their systems on a budget.

In contrast, the Noctua NH-L12S targets enthusiasts and professionals who are willing to invest more for a quieter, more efficient cooling solution. Its premium build quality and design cater to users who prioritise performance in compact setups, such as home theatre PCs or small form-factor builds.

Warranty and Support

Warranty and support policies often influence purchasing decisions. The specifics regarding warranty for the Thermalright Assassin X are not provided, which could be a drawback for potential buyers looking for solid post-purchase support.

Noctua is known for its excellent customer support and typically offers a comprehensive warranty on its products. This reliability can provide peace of mind for users investing more into their cooling solution, knowing they have support should any issues arise.

Which should you buy?

Deciding between the Thermalright Assassin X 120R Digital ARGB Black and the Noctua NH-L12S ultimately depends on your specific needs and preferences. If you're looking for an affordable cooler that offers decent performance and aesthetic appeal with ARGB features, the Thermalright model at C$32.90 is a suitable choice.

However, if you value compact design, premium quality, and ultra-quiet operation, the Noctua NH-L12S, while more expensive at C$87.95, may be the better option. Its inclusion of high-quality thermal paste and reputable support makes it a compelling choice for enthusiasts. Thus, your choice should hinge on your budget and the specific requirements of your build.

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Thermalright Assassin X 120R Digital ARGB Black CPU Cooler vs Noctua NH-L12S | versusfinder