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Thermalright Assassin King 120 SE White ARGB CPU vs Thermalright Assassin X 120R SE V2 CPU Cooler, 4×

Updated August 2026 — Thermalright Assassin King 120 SE White ARGB CPU leads on aesthetics and cooling.

The Thermalright Assassin King offers superior aesthetics and cooling performance, while the Assassin X is a more budget-friendly option. Choose based on your priorities.

Why Thermalright Assassin King 120 SE White ARGB CPU is better

Cooling Power

Assassin King has 5 heat pipes vs 4 in Assassin X

Aesthetics

Assassin King features ARGB lighting

Performance

Both have same airflow, but King has better cooling efficiency

Why Thermalright Assassin X 120R SE V2 CPU Cooler, 4× is better

Price

Assassin X is $3.23 cheaper

Compatibility

Assassin X supports more Intel sockets

Size

Assassin X is slightly narrower

Overall score

Thermalright Assassin King 120 SE White ARGB CPU
85
Thermalright Assassin X 120R SE V2 CPU Cooler, 4×
78

Specifications

SpecThermalright Assassin King 120 SE White ARGB CPUThermalright Assassin X 120R SE V2 CPU Cooler, 4×
Fan Speed1550 RPM1550 RPM
Air Flow66.17 CFM66.17 CFM
Noise Level≤25.6 dB(A)≤25.6 dB(A)
Socket SupportLGA 115X/AM4LGA 1150/AM4/AM5
Bearing TypeS-FDBS-FDB

Dimension comparison

Thermalright Assassin King 120 SE White ARGB CPUThermalright Assassin X 120R SE V2 CPU Cooler, 4×

Overview of Thermalright CPU Coolers

When comparing the Thermalright Assassin King 120 SE White ARGB CPU Air Cooler with the Thermalright Assassin X 120R SE V2 CPU Cooler, it's clear that both options provide solid cooling performance. The Assassin King is priced at $19.82, while the Assassin X is slightly cheaper at $16.59. This makes the Assassin X about 17% less expensive, which may appeal to budget-conscious consumers. Both models are designed for efficient cooling and quiet operation, making them suitable for various PC builds.

Design and Aesthetics

The design of both coolers is impressive, with the Assassin King featuring an ARGB lighting system that adds a visually striking element to any rig. Measuring 120mm in length, 73mm in width, and 148mm in height, it emphasizes a sleek profile with a white finish. In contrast, the Assassin X, with a similar height of 148mm but slightly narrower at 71mm, offers a more understated look. Both coolers utilize aluminum heat sinks and have efficient PWM fans, but the Assassin King’s ARGB lighting makes it stand out in terms of aesthetics for those seeking a vibrant lighting setup.

Cooling Performance

Both coolers utilize a 120mm PWM fan capable of reaching speeds of 1550 RPM, which is effective in promoting airflow. The Assassin King incorporates five 6mm heat pipes, while the Assassin X uses four 6mm heat pipes. Although both are designed for optimal thermal performance, the additional heat pipe in the Assassin King may provide a slight edge in cooling efficiency, especially during peak usage. Each cooler can achieve a maximum air flow of 66.17 CFM, ensuring that both options can handle demanding CPU loads effectively.

Noise Levels

Noise levels are a crucial factor for PC builders, and both the Assassin King and Assassin X are designed to operate quietly. Each cooler boasts a noise level of ≤25.6 dB(A), allowing for almost silent operation during typical use. This means that whether you choose the Assassin King or the Assassin X, you can expect a similar level of quietness, making either cooler suitable for a noise-sensitive environment.

Compatibility

When it comes to compatibility, both coolers support a wide range of CPU sockets. The Assassin King is compatible with Intel sockets LGA 115X/1200/1700 and AMD AM4, while the Assassin X supports LGA 1150/1151/1155/1156/1200/1700 and AMD AM4/AM5. This broad compatibility ensures that either cooler can fit a variety of builds, making them versatile choices for gamers and PC enthusiasts alike. Both products come with the necessary mounting hardware for installation.

Build Quality

The build quality of both coolers is commendable, as Thermalright has utilized durable materials in their construction. The Assassin King features a combination of industrial-grade PBT and PC materials, while the Assassin X uses a similar high-quality construction. Both coolers are equipped with S-FDB bearings that not only reduce noise but also enhance the longevity of the fans. This attention to detail in build quality is evident in both products, ensuring that they can operate effectively over extended periods.

Price Comparison

The price difference between the Assassin King and the Assassin X is notable, with the Assassin King retailing at $19.82 and the Assassin X at $16.59. This signifies a cost savings of about $3.23 if you opt for the Assassin X. While the price difference is relatively small, it may influence buyers looking for quality cooling solutions at a more economical price. Both coolers offer excellent performance for their price points, making them competitive options in the CPU cooler market.

Which should you buy?

Choosing between the Thermalright Assassin King 120 SE White ARGB CPU Air Cooler and the Thermalright Assassin X 120R SE V2 CPU Cooler ultimately depends on your preferences and requirements. If you prioritize aesthetics and want additional cooling power, the Assassin King may be the better option for you, despite its higher price. However, if budget is your primary concern without sacrificing cooling performance, the Assassin X offers a compelling alternative at a lower cost. Both coolers deliver impressive performance and compatibility, making them solid choices for anyone looking to enhance their PC cooling setup.