Thermalright Assassin X 120R SE V2 CPU Air Cooler vs upHere H45K6 Low Profile CPU Cooler 45mm Height - 6 Heat Pipes
Updated August 2026 — The Thermalright Assassin X 120R SE V2 offers better value for budget-conscious users, while the upHere H45K6 excels in compact builds with superior cooling performance.
The Thermalright Assassin X 120R SE V2 offers better value for budget-conscious users, while the upHere H45K6 excels in compact builds with superior cooling performance.
Why Thermalright Assassin X 120R SE V2 CPU Air Cooler is better
lower price
C$23.59 vs C$49.99
quieter operation
≤25.6 dB(A) vs ≤27 dB(A)
self-luminous fan
adds visual appeal
Why upHere H45K6 Low Profile CPU Cooler 45mm Height - 6 Heat Pipes is better
compact design
45mm height fits Mini ITX cases
better cooling
150W TDP with 6 heat pipes
faster installation
tool-free setup in under 5 minutes
Overall score
Specifications
| Spec | Thermalright Assassin X 120R SE V2 CPU Air Cooler | upHere H45K6 Low Profile CPU Cooler 45mm Height - 6 Heat Pipes |
|---|---|---|
| Price | C$23.59 | C$49.99 |
| Socket Support | LGA1150/1151/1155/1156/1200/1700/AM4/AM5 | LGA1851/1700/115x/1200/2011/2066/AM5/AM4/AM3 |
| Fan RPM | 1550 | 800-2800 |
| TDP | N/A | 150W |
| Lifespan | 20000 hours | 40000 hours |
Dimension comparison
Price Comparison
The Thermalright Assassin X 120R SE V2 is priced at C$23.59, while the upHere H45K6 Low Profile CPU Cooler is significantly more expensive at C$49.99. This price difference of C$26.40 makes the Thermalright option more appealing for budget-conscious consumers. Despite the cost disparity, both coolers offer unique features that justify their pricing, catering to different user needs in the CPU cooling market.
Design and Dimensions
The Thermalright Assassin X 120R SE V2 boasts a height of 148mm, making it suitable for medium-sized computer cases. It features a standard size PWM fan measuring 120x120x25mm. In contrast, the upHere H45K6 is designed with ultra-compact dimensions, standing at just 45mm tall. This low-profile design allows it to fit effortlessly into space-constrained Mini ITX cases, making it ideal for compact builds. The significant height difference illustrates the Thermalright cooler's compatibility with larger cases, while the upHere cooler targets users with smaller setups.
Cooling Performance
In terms of cooling capabilities, the Thermalright Assassin X 120R SE V2 utilises 4 heat pipes and a fan that delivers an airflow of 66.17 CFM. This results in efficient cooling while maintaining a noise level of ≤25.6 dB(A). On the other hand, the upHere H45K6 features six heat pipes designed to handle a thermal design power (TDP) of up to 150W. The 90mm fan pushes 35.34 CFM airflow at a slightly higher noise level of ≤27 dB(A). While both coolers provide effective cooling, the upHere model is engineered for more intense thermal management, suitable for mainstream CPUs under sustained workloads.
Noise Levels
The Thermalright Assassin X 120R SE V2 operates quietly, with a noise level that does not exceed 25.6 dB(A). This feature is essential for users who prioritize a silent computing environment. Meanwhile, the upHere H45K6 maintains a noise level of ≤27 dB(A). While both coolers are designed for quiet operation, the Thermalright cooler has a slight edge in noise reduction, catering to those who prefer an ultra-quiet workspace.
Compatibility
Compatibility is a crucial aspect when choosing a CPU cooler. The Thermalright Assassin X 120R SE V2 supports a wide range of Intel sockets, including LGA1150, 1151, 1155, 1156, 1200, 1700, and AMD's AM4 and AM5 sockets. This broad compatibility makes it versatile for various builds. Conversely, the upHere H45K6 also exhibits extensive compatibility, supporting Intel LGA 1851, 1700, 115x, 1200, 2011, and 2066, along with AMD AM5, AM4, and AM3 sockets. Both coolers provide ample options for users, yet the Thermalright model covers a slightly wider array of Intel socket options.
Installation Process
The installation process for both coolers is designed to be user-friendly. The Thermalright Assassin X 120R SE V2 comes with installation videos and instructions, ensuring a straightforward setup for users. The upHere H45K6 emphasizes its tool-free installation, which can be completed in under five minutes. This ease of installation is particularly beneficial for beginners or those who frequently upgrade their systems. While both coolers are designed for simplicity, the upHere model stands out for its rapid installation process.
Aesthetics
Aesthetics may not be the primary concern for all users, but it plays a role in the overall appeal of a CPU cooler. The Thermalright Assassin X 120R SE V2 features a self-luminous fan that lights up once plugged in, adding a visual element to the build. In comparison, the upHere H45K6 offers a more utilitarian look, prioritizing function over flashy design. Users seeking a cooler that enhances the visual appeal of their setup may lean towards the Thermalright, while those focused solely on performance may prefer the straightforward design of the upHere cooler.
Which should you buy?
Ultimately, the choice between the Thermalright Assassin X 120R SE V2 and the upHere H45K6 comes down to individual needs and preferences. If you are on a budget and require a cooler that fits in medium-sized cases while maintaining a quiet operation, the Thermalright model at C$23.59 is an excellent choice. However, if you are building a compact system with limited space and need robust cooling capabilities, the upHere H45K6, priced at C$49.99, offers superior thermal performance and compatibility in smaller builds. Consider your specific requirements, including case size, cooling demands, and budget, to make the best decision.
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