Noctua NH-D15 G2 vs upHere H45K6 Low Profile CPU Cooler 45mm Height - 6 Heat Pipes
Updated August 2026 — The Noctua NH-D15 G2 excels in performance and features, making it the superior choice for high-end builds, while the upHere H45K6 offers a budget-friendly option for compact systems.
The Noctua NH-D15 G2 excels in performance and features, making it the superior choice for high-end builds, while the upHere H45K6 offers a budget-friendly option for compact systems.
Why Noctua NH-D15 G2 is better
Cooling Performance
Superior heat dissipation with 8 heat pipes.
Fan Technology
Dual 140mm fans provide better airflow.
Build Quality
Premium materials and design for durability.
Why upHere H45K6 Low Profile CPU Cooler 45mm Height - 6 Heat Pipes is better
Price
Significantly lower cost at C$49.99.
Size
Ultra-compact design fits in Mini ITX cases.
Installation
Quick tool-free installation process.
Overall score
Specifications
| Spec | Noctua NH-D15 G2 | upHere H45K6 Low Profile CPU Cooler 45mm Height - 6 Heat Pipes |
|---|---|---|
| Heat Pipes | 8 | 6 |
| TDP | 250W | 150W |
| Noise Level | ≤25 dB(A) | ≤27 dB(A) |
| Compatibility | AMD AM5, Intel LGA1700 | AMD AM4, Intel LGA1700 |
| Fan Speed | 450-1500 RPM | 800-2800 RPM |
Dimension comparison
Price Comparison
The Noctua NH-D15 G2 is significantly more expensive than the upHere H45K6 Low Profile CPU Cooler. Priced at C$209.95, the NH-D15 G2 positions itself as a premium option in the CPU cooler market. In contrast, the upHere H45K6 is much more budget-friendly, retailing at C$49.99. This clear price difference of C$159.96 indicates that the Noctua cooler is likely aimed at enthusiasts seeking top-tier performance and features, while the upHere cooler targets users looking for an economical solution for smaller builds.
Cooling Performance
When it comes to cooling performance, the Noctua NH-D15 G2 boasts enhanced capabilities due to its advanced design. It features eight heat pipes and a 20% increase in surface area compared to its predecessor, making it highly efficient at dissipating heat, especially for powerful CPUs like the Ryzen 9 9950X or Core Ultra 285K. Meanwhile, the upHere H45K6 employs six heat pipes that provide efficient heat dissipation and a TDP of 150W. This design is adequate for mainstream CPUs, making the NH-D15 G2 a stronger choice for high-performance setups while the upHere H45K6 excels in compact environments.
Design and Size
The NH-D15 G2 has a larger form factor compared to the upHere H45K6, which is designed for ultra-compact builds. The upHere cooler's 45mm height allows it to fit seamlessly into Mini ITX cases without obstructing RAM or motherboard components, making it ideal for space-constrained setups. On the other hand, the NH-D15 G2, while larger, features an offset design that provides 59mm of RAM clearance in single-fan mode, allowing for compatibility with taller RAM modules. Users need to consider their case size and build requirements when choosing between these two coolers.
Fan Technology
The Noctua NH-D15 G2 features two state-of-the-art NF-A14x25r G2 140mm fans, which are designed for optimal performance and quiet operation. These fans allow for speed adjustment through PWM and low-noise adaptors, ensuring maximum efficiency under load and near-silent performance during idle. In contrast, the upHere H45K6 is equipped with a slim 90mm PWM fan that operates within a range of 800 to 2800 RPM, providing airflow of 35.34 CFM at a noise level of ≤27 dB(A). While both coolers have noise-conscious designs, the NH-D15 G2 offers greater airflow and cooling capacity due to its larger fan size and dual-fan configuration.
Installation Process
The installation process for both coolers is designed to be user-friendly, though they differ in complexity due to their designs. The Noctua NH-D15 G2 comes with a comprehensive SecuFirm2+ mounting system and includes a Torx-based screwdriver for easy installation across various Intel and AMD sockets. This allows for a straightforward setup, although the larger size of the cooler may require more careful handling. Conversely, the upHere H45K6 emphasizes quick installation, claiming it can be set up in under five minutes with tool-free features. This makes it particularly appealing for users who prioritize simplicity in building their systems.
Compatibility
The Noctua NH-D15 G2 supports a wide range of sockets, including AMD AM5, LGA1851, and LGA1700, making it versatile for various CPU types. It is particularly well-suited for high-end processors. The upHere H45K6 also offers broad compatibility, supporting Intel LGA 1851/1700/115x/1200/2011/2066 and AMD AM5/AM4/AM3 sockets. Despite both coolers having extensive compatibility, the NH-D15 G2 is designed for high-performance CPUs, while the upHere H45K6 is tailored more toward mainstream CPUs, making it a better choice for users with less demanding needs.
Noise Levels
Noise levels are a critical factor for many users, especially in quiet environments. The NH-D15 G2 is engineered for near-silent operation at idle, thanks to its advanced fan technology and design, which help to minimize noise while still providing robust cooling. The specific noise levels are not mentioned, but the design aims for acoustic fine-tuning. On the other hand, the upHere H45K6 operates at a maximum noise level of ≤27 dB(A), which is relatively quiet and suitable for silent builds. Users who prioritize a quieter operation may find both options satisfactory, but the NH-D15 G2’s engineering suggests superior performance in this category.
Which should you buy?
Choosing between the Noctua NH-D15 G2 and the upHere H45K6 ultimately depends on your specific needs and budget. If you are building a high-performance system and require top-tier cooling efficiency, the NH-D15 G2 is worth the investment at C$209.95. Its superior cooling capabilities, dual-fan design, and broad compatibility make it a standout choice for enthusiasts. However, if you are looking for a cost-effective solution for a compact build without sacrificing essential performance, the upHere H45K6 at C$49.99 is an excellent option. It offers solid cooling for mainstream CPUs while fitting seamlessly into smaller cases. Evaluate your priorities, and choose the cooler that best aligns with your build requirements and financial considerations.
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