Thermalright Assassin X 120 SE CPU Air Cooler vs Thermalright Assassin King 120 SE ARGB CPU Air Cooler
Updated August 2026 — The Thermalright Assassin King 120 SE ARGB offers better aesthetics with ARGB lighting, while the Assassin X 120 SE focuses on performance. Choose based on your preference for style or performance.
The Thermalright Assassin King 120 SE ARGB offers better aesthetics with ARGB lighting, while the Assassin X 120 SE focuses on performance. Choose based on your preference for style or performance.
Why Thermalright Assassin X 120 SE CPU Air Cooler is better
higher TDP
Assassin X supports up to 225W TDP
weight
Assassin X is heavier, indicating sturdiness
fan model
Assassin X uses a standard fan for performance
Why Thermalright Assassin King 120 SE ARGB CPU Air Cooler is better
ARGB lighting
Assassin King features customizable ARGB lighting
newer socket support
Assassin King supports AM5 socket
lighter weight
Assassin King is lighter, making installation easier
Overall score
Specifications
| Spec | Thermalright Assassin X 120 SE CPU Air Cooler | Thermalright Assassin King 120 SE ARGB CPU Air Cooler |
|---|---|---|
| TDP | 125-225W | 125-235W |
| Fan Speed | 1550 RPM | 1550 RPM |
| Airflow | 66.17 CFM | 66.17 CFM |
| Noise Level | 25.6 dB(A) | 25.6 dB(A) |
| Socket Support | 115X/1200/1700/AM4 | 115X/1200/1700/AM4/AM5 |
Dimension comparison
Overview of the Products
The Thermalright Assassin X 120 SE and the Thermalright Assassin King 120 SE ARGB are two competitive options in the CPU cooler market, both priced affordably at C$25.59 and C$24.59 respectively. These coolers are designed to provide efficient thermal management for CPUs, enhancing performance while maintaining a low noise level. Both products come from Thermalright, a brand with over 20 years of experience in developing computer accessories, making them reliable choices for gamers and enthusiasts alike.
Design and Build Quality
When it comes to design, the Thermalright Assassin X 120 SE boasts dimensions of 125mm x 71mm x 148mm and weighs 0.645kg, while the Assassin King 120 SE ARGB measures 120mm x 73mm x 148mm and is lighter at 0.52kg. The aluminum heat sink material used in both products ensures durability and efficiency. The Assassin King features an ARGB fan that adds a visually appealing touch, while the Assassin X focuses purely on performance with its standard fan setup. Both coolers are compatible with Intel and AMD platforms, providing flexibility for various build types.
Cooling Performance
Cooling performance is crucial in CPU coolers, and both models excel in this area. The Thermalright Assassin X 120 SE has a thermal design power (TDP) rating of 125W to 225W, while the Assassin King 120 SE ARGB has a slightly higher TDP rating of 125W to 235W. Each cooler features a PWM fan with a maximum speed of 1550 RPM and an airflow rating of 66.17 CFM. Additionally, both coolers maintain a noise level of 25.6 dB(A), ensuring a quiet operation even under load. This makes either option suitable for users who prioritize thermal efficiency without excess noise.
Fan Technology
Both the Thermalright Assassin X 120 SE and the Assassin King 120 SE ARGB utilize advanced fan technology to enhance cooling efficiency. The Assassin X features the TL-C12C fan, while the Assassin King is equipped with the TL-C12C-S fan, which offers the added benefit of ARGB lighting effects. This lighting feature allows users to customise their build aesthetics without compromising on performance. The standard fan in the Assassin X, while effective, lacks the visual flair provided by its counterpart, which may be a deciding factor for those who want to add a touch of style to their setups.
Installation and Compatibility
Installation is straightforward for both CPU coolers, with each product featuring metal fasteners compatible with Intel and AMD platforms. The Assassin X supports Intel sockets 115X, 1200, and 1700, as well as AMD AM4, while the Assassin King adds compatibility for the newer AM5 socket. This additional compatibility may appeal to users looking to future-proof their systems. Both coolers come with necessary mounting plates and fasteners for easy setup, ensuring a user-friendly experience.
Longevity and Reliability
Durability is a key consideration for CPU coolers, and both the Thermalright Assassin X 120 SE and the Assassin King 120 SE ARGB promise longevity. Both models boast a service life of up to 20,000 hours, facilitated by S-FDB bearings that enhance reliability. The use of high-quality materials, including UL class A safety insulation and industrial-grade PBT + PC material, ensures that both products can withstand prolonged use without compromising performance. This reliability factor makes them suitable for both casual users and hardcore gamers.
Price Comparison
The Thermalright Assassin X 120 SE is priced at C$25.59, while the Assassin King 120 SE ARGB comes in slightly lower at C$24.59. The price difference of C$1 may not significantly impact the purchasing decision; however, the additional ARGB features of the Assassin King offer enhanced value for those interested in aesthetics. Both products provide excellent thermal performance at an affordable price point, making them accessible options for a wide range of users.
Which should you buy?
Choosing between the Thermalright Assassin X 120 SE and the Thermalright Assassin King 120 SE ARGB ultimately depends on your specific needs and preferences. If you prioritise performance and a slightly higher TDP rating, the Assassin X may be the better choice. However, if you're interested in aesthetics and the latest technology with ARGB lighting, the Assassin King would be more suitable. Both offer exceptional cooling capabilities, quiet operation, and solid build quality, making either a worthy addition to your PC setup.
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