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Thermalright Assassin X 120R Digital ARGB White CPU Cooler Air with 4X6mm HeatPi vs upHere H45K6 Low Profile CPU Cooler 45mm Height - 6 Heat Pipes

Updated August 2026The Thermalright Assassin X 120R excels in cooling performance and features, while the upHere H45K6 is better for compact builds and quiet operation.

The Thermalright Assassin X 120R excels in cooling performance and features, while the upHere H45K6 is better for compact builds and quiet operation.

Why Thermalright Assassin X 120R Digital ARGB White CPU Cooler Air with 4X6mm HeatPi is better

Cooling Performance

Higher RPM fan and advanced heat pipe technology.

Features

Includes a digital screen for monitoring.

Price

More affordable at C$28.39.

Why upHere H45K6 Low Profile CPU Cooler 45mm Height - 6 Heat Pipes is better

Size

Ultra-compact 45mm height for small cases.

Noise Levels

Quieter operation at 27 dB(A).

Installation

Tool-free installation in under five minutes.

Overall score

Thermalright Assassin X 120R Digital ARGB White CPU Cooler Air with 4X6mm HeatPi
85
upHere H45K6 Low Profile CPU Cooler 45mm Height - 6 Heat Pipes
75

Specifications

SpecThermalright Assassin X 120R Digital ARGB White CPU Cooler Air with 4X6mm HeatPiupHere H45K6 Low Profile CPU Cooler 45mm Height - 6 Heat Pipes
RPM20002800
TDPUnknown150W
Socket SupportDualUniversal
Noise LevelUnknown27 dB(A)
MaterialPBT+PCAluminum

Dimension comparison

Thermalright Assassin X 120R Digital ARGB White CPU Cooler Air with 4X6mm HeatPiupHere H45K6 Low Profile CPU Cooler 45mm Height - 6 Heat Pipes

Design and Size

When considering design and size, the upHere H45K6 Low Profile CPU Cooler stands out with its ultra-compact 45mm height, making it ideal for space-constrained Mini ITX cases. In contrast, the Thermalright Assassin X 120R features a more traditional design with a single tower and a digital screen on top, providing not only aesthetics but also functionality. With its larger build, the Assassin X may require more space, which could be a limiting factor for users with smaller cases. The H45K6’s low profile ensures that it fits seamlessly into small-form-factor builds without obstructing other components, while the Assassin X, though not oversized, is better suited for standard ATX or larger cases.

Cooling Performance

Cooling performance is a critical factor, and the Thermalright Assassin X 120R boasts an impressive heat dissipation capability attributed to its four 6mm heat pipes and a high-speed 2000 RPM PWM fan. This cooler is designed for efficient thermal management, especially under heavy workloads. On the other hand, the upHere H45K6 utilises six heat pipes and is rated for a 150W TDP, ensuring reliable cooling for mainstream CPUs. While both coolers are effective, the Assassin X’s higher RPM fan may provide better cooling performance, especially in demanding scenarios, but it also comes with a higher price tag of C$28.39 compared to the H45K6’s C$49.99.

Noise Levels

Noise levels are a significant consideration for many PC builders, and in this aspect, the upHere H45K6 excels. With its slim 15mm PWM fan operating between 800 to 2800 RPM, it generates a maximum noise level of just 27 dB(A), making it an excellent choice for silent builds. In contrast, the Thermalright Assassin X’s fan, while powerful at 2000 RPM, does not specify its noise level, leaving potential users with uncertainty regarding its quiet operation. For those prioritising a whisper-quiet experience, the H45K6 is likely the better option.

Compatibility

Compatibility is crucial when selecting a CPU cooler, and both products cater to a broad range of sockets. The upHere H45K6 supports Intel LGA 1851/1700/115x/1200/2011/2066 and AMD AM5/AM4/AM3 sockets, ensuring it can fit various systems without interference with RAM or motherboard heatsinks. Meanwhile, the Thermalright Assassin X is also compatible with dual platforms, including Intel and AMD sockets. However, its design is more suited for standard builds, while the low-profile design of the H45K6 guarantees zero obstruction with RAM slots, making it particularly advantageous for users with limited space.

Installation Process

The installation process can significantly affect user experience, and the upHere H45K6 promises a tool-free installation that can be completed in under five minutes. This user-friendly design caters to both novice and experienced builders looking for convenience. In comparison, the Thermalright Assassin X requires software installation for its digital screen functionality, which may add complexity to the setup process. Users looking for a straightforward installation may prefer the H45K6 for its simplicity and ease of use.

Aesthetics

Aesthetics may not directly affect performance, but they play a role in the overall appeal of a build. The Thermalright Assassin X 120R features a striking digital screen on top that displays vital CPU and GPU metrics, adding a modern touch to any setup. This visual element, combined with its sleek design, makes it a standout option for users who value aesthetics. In contrast, the upHere H45K6, while functional and compact, does not offer the same level of visual flair, focusing instead on performance and compatibility.

Price Comparison

When it comes to pricing, the Thermalright Assassin X 120R is priced at C$28.39, making it more affordable than the upHere H45K6, which retails for C$49.99. This difference in price may influence buyers, particularly those on a budget. However, it’s essential to consider what each cooler offers for its price. The Assassin X provides advanced features like a digital monitoring system, while the H45K6 focuses on compact design and silent operation. Ultimately, the choice may come down to whether users value advanced functionality or a budget-friendly solution.

Which should you buy?

Choosing between the Thermalright Assassin X 120R and the upHere H45K6 ultimately depends on your specific needs and system requirements. If you require a cooler that fits in a compact space and operates quietly, the upHere H45K6 is the clear winner with its low-profile design and low noise levels. However, if you prefer advanced features such as a digital screen for real-time monitoring and are willing to allocate more budget towards performance, the Thermalright Assassin X 120R may be the better choice. Each cooler has its strengths, so your decision should align with your priorities in terms of performance, design, and budget.

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Thermalright Assassin X 120R Digital ARGB White CPU Cooler Air with 4X6mm HeatPi vs upHere H45K6 Low Profile CPU Cooler 45mm Height - 6 Heat Pipes | versusfinder