Thermalright Assassin X 120 SE ARGB CPU Air Cooler vs upHere H45K6 Low Profile CPU Cooler 45mm Height - 6 Heat Pipes
Updated August 2026 — The Thermalright Assassin X 120 SE offers superior cooling performance and brand reputation, while the upHere H45K6 excels in compact design and ease of installation.
The Thermalright Assassin X 120 SE offers superior cooling performance and brand reputation, while the upHere H45K6 excels in compact design and ease of installation.
Why Thermalright Assassin X 120 SE ARGB CPU Air Cooler is better
Cooling Performance
Higher TDP rating of 225W
Brand Reputation
Established brand with over 20 years of experience
Dimensions
Better cooling capacity in larger cases
Why upHere H45K6 Low Profile CPU Cooler 45mm Height - 6 Heat Pipes is better
Compact Design
Ultra-compact 45mm height for Mini ITX cases
Installation Ease
Tool-free installation in under 5 minutes
Compatibility
Wider range of socket support including newer types
Overall score
Specifications
| Spec | Thermalright Assassin X 120 SE ARGB CPU Air Cooler | upHere H45K6 Low Profile CPU Cooler 45mm Height - 6 Heat Pipes |
|---|---|---|
| Cooling TDP | 225W | 150W |
| Noise Level | 25.6 dB(A) | 27 dB(A) |
| Fan RPM | 1550 | 800-2800 |
| Socket Support | Intel 115X/1200/1700, AMD AM4 | Intel LGA 1851/1700/115x/1200/2011/2066, AMD AM5/AM4/AM3 |
| Installation | Metal fasteners | Tool-free |
Dimension comparison
Price Comparison
The Thermalright Assassin X 120 SE ARGB CPU Air Cooler is priced at C$24.29, while the upHere H45K6 Low Profile CPU Cooler is significantly more expensive at C$49.99. This nearly double price difference of C$25.70 positions the upHere cooler as a premium option. While price alone doesn't determine value, it does indicate that consumers should consider the specific features and performance capabilities of each cooler to justify the investment in the upHere model.
Design and Size
The Thermalright Assassin X 120 SE features a standard height of 148mm, making it suitable for medium-sized computer cases. In contrast, the upHere H45K6 boasts an ultra-compact design at only 45mm in height, which makes it ideal for space-constrained Mini ITX cases. The low profile of the upHere cooler allows for seamless installation without compromising performance, making it an excellent choice for small-form-factor builds. The significant difference in design dimensions highlights the upHere cooler's versatility in fitting into various setups, especially where space is a premium.
Cooling Performance
The Thermalright Assassin X 120 SE excels with a TDP (Thermal Design Power) rating of up to 225W, thanks to its advanced AGHP technique and four 6mm heat pipes. This ensures efficient cooling capabilities even under heavy loads. In comparison, the upHere H45K6 manages a respectable 150W TDP with its six Φ6mm heat pipes. While both coolers are designed for effective heat dissipation, the Thermalright model offers a higher TDP, indicating superior cooling performance for more demanding CPUs, which could be crucial for gamers and content creators.
Noise Levels
When it comes to noise, the Thermalright Assassin X 120 SE operates at a maximum of 25.6 dB(A), providing a quiet computing experience. On the other hand, the upHere H45K6 features a slim 90mm fan that operates between 800 to 2800 RPM, with a noise level capped at 27 dB(A). Although the upHere cooler is slightly louder at maximum RPM, both coolers are designed for low-noise operation, making them suitable for users who prioritize a quiet environment. The similarity in noise levels suggests that users can expect a relatively quiet performance from either option.
Installation Ease
The Thermalright Assassin X 120 SE includes metal fasteners for both Intel and AMD platforms, ensuring compatibility and easier installation. Conversely, the upHere H45K6 is engineered for tool-free installation that can be completed in under five minutes. Its design avoids interference with RAM and other motherboard components, guaranteeing 100% memory clearance even in tight Mini ITX setups. While both coolers offer ease of installation, the upHere cooler’s tool-free process and low-profile design provide a significant advantage for users looking for quick and hassle-free setups.
Compatibility
Both coolers demonstrate broad compatibility across various CPU sockets. The Thermalright Assassin X 120 SE supports Intel's 115X, 1200, 1700, and AMD's AM4, making it versatile for common platforms. In contrast, the upHere H45K6 is engineered to support a wider range of Intel sockets, including LGA 1851, 1700, 115x, 1200, 2011, and 2066, as well as AMD’s AM5, AM4, and AM3. This enhanced compatibility with newer socket types makes the upHere cooler a more future-proof choice for users looking to upgrade their systems without changing their cooling solution.
Brand Reputation
Thermalright has over 20 years of experience in the cooling solutions market, establishing a strong reputation among PC enthusiasts. The brand is well-regarded for its high-quality products and innovation in CPU cooling technology. The upHere brand, while also competent, may not have the same level of recognition as Thermalright. Users who prioritize brand reputation and proven performance may lean towards the Thermalright Assassin X 120 SE, while those looking for a compact solution may still consider the upHere cooler.
Which should you buy?
Choosing between the Thermalright Assassin X 120 SE ARGB CPU Air Cooler and the upHere H45K6 Low Profile CPU Cooler ultimately hinges on your specific needs. If you require superior cooling performance with high TDP support and a trusted brand, the Thermalright model is the better option. However, if you're building a compact PC and need a low-profile cooler that fits in tight spaces without sacrificing efficiency, the upHere cooler offers excellent value with its ease of installation and compatibility. Consider your case size, cooling needs, and budget to make the best choice for your build.
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