Thermalright Peerless Assassin 120 Black CPU Air Cooler vs Noctua NH-U12S

Cooling Performance

The Thermalright Peerless Assassin 120 Black offers notably strong cooling with its twin tower design and dual 120mm fans, while the Noctua NH-U12S features a slim-tower design with a single 120mm fan optimized for focused airflow. The Peerless Assassin’s heat dissipation area measures an impressive 9600 cm², supported by six 6mm pure copper sintered heat pipes using AGHP technology to combat inverse gravity effects. Its dual fans spin at up to 1500 RPM each, delivering a combined airflow of 66.17 CFM. In contrast, the NH-U12S’s performance benefits from the highly optimized NF-F12 fan with PWM control and a low-noise adaptor, but as it has only one fan and a smaller heat sink, it may not match the raw cooling surface and airflow of the Peerless Assassin. Overall, the Peerless Assassin 120 Black is engineered for more aggressive heat dissipation, likely providing superior cooling for high-TDP CPUs.

Noise Levels

Noise performance is critical in CPU coolers, and both models aim for quiet operation with different approaches. The Thermalright Peerless Assassin 120 Black’s dual TL-C12B fans operate at 1500 RPM ±10%, producing noise levels up to 25.6 dB(A). While two fans might suggest higher noise, the Peerless Assassin maintains relatively low sound output for its air volume. The Noctua NH-U12S features the NF-F12 fan with PWM speed control and an included low-noise adaptor, designed to minimize acoustic disturbance during operation. Although specific noise levels for the NH-U12S are not provided here, Noctua’s reputation and included noise-reduction features suggest it is likely quieter at similar cooling loads. Users valuing ultra-quiet performance may lean towards the NH-U12S, but the Peerless Assassin balances higher airflow with acceptable noise.

Build and Materials

The Peerless Assassin 120 Black and Noctua NH-U12S both use high-quality materials but with different design philosophies. Thermalright’s cooler employs a full electroplating reflow welding process and a black nanoscale paint coating on its twin aluminum towers, enhancing heat dissipation and durability. It also boasts a pure copper base and six pure copper sintered heat pipes to efficiently transfer heat. The NH-U12S is notable for its slim-tower aluminium heatsink paired with a solid copper base, combined with Noctua’s well-regarded build quality and longevity. While exact material details for the NH-U12S’s heat pipes aren’t listed here, the focus is on premium craftsmanship and reliable long-term performance. Both coolers exhibit robust construction, but the Peerless Assassin’s dual-tower design and copper components give it an edge in raw thermal management.

Compatibility and Installation

Compatibility is a strong suit for both coolers, but the Peerless Assassin 120 Black offers broader CPU socket support out of the box. It supports Intel sockets from LGA1150 through LGA2066, including the latest LGA1700 and 17XX series, plus AMD AM4 and AM5 platforms. Included metal fasteners ensure better installation across these platforms. The Noctua NH-U12S supports Intel LGA1851, LGA1700, LGA1200, LGA115x, and AMD AM4 and AM5 sockets, featuring the SecuFirm2 mounting system for easy installation. The slim design of the NH-U12S minimizes overhang on RAM and PCIe slots on most motherboards, enhancing compatibility in tighter cases. The Peerless Assassin’s offset asymmetric layout allows installation without blocking the first graphics card slot, an advantage for systems with limited space. Both coolers are versatile, but the Peerless Assassin’s wider socket range and dual-tower form factor may require more case clearance.

Size and Dimensions

Size impacts case compatibility and overall system airflow, and these two coolers differ notably. The Thermalright Peerless Assassin 120 Black measures 125 mm in length, 135 mm in width, and 157 mm in height. Its dual-tower structure and two 120 mm fans give it a larger footprint and potentially more clearance challenges in smaller cases. By contrast, the Noctua NH-U12S follows a classic slim-tower approach with a single 120 mm fan, designed specifically to avoid overhanging RAM and PCIe slots on most current motherboards. Although exact NH-U12S dimensions are not specified here, its slim profile is a deliberate design to maximize compatibility in mid-sized cases and improve airflow around other components. Users with limited space or who prioritise component clearance may prefer the NH-U12S for its compactness.

Price and Value

The Thermalright Peerless Assassin 120 Black is priced at C$54.90, making it the more budget-friendly option between the two. It offers dual fans, a large heat dissipation surface, and broad socket compatibility at this competitive price point. The Noctua NH-U12S is priced higher at C$79.95, reflecting its premium build quality, renowned brand reputation, and inclusion of extras such as high-end NT-H1 thermal paste and a secure mounting system. While the Peerless Assassin offers more cooling hardware for less money, the NH-U12S’s higher price may be justified by quieter operation, ease of installation, and a 6-year manufacturer’s warranty. Buyers will need to weigh raw cooling power against quieter operation and brand assurance when considering value.

Additional Features

Both coolers provide features aimed at enhancing user experience and cooling efficiency. The Peerless Assassin utilises the AGHP technique on its six 6mm heat pipes to counteract the inverse gravity effect caused by different installation orientations, ensuring stable performance regardless of case layout. It also benefits from dual PWM fans for dynamic speed control. The NH-U12S includes the highly optimised NF-F12 fan with PWM support and an automatic low-noise adaptor, which helps balance cooling and acoustic performance. Additionally, Noctua includes high-end thermal paste (NT-H1) and a SecuFirm2 mounting system for easy and secure installation. The NH-U12S also comes with a 6-year warranty, underscoring confidence in long-term durability. These extras add significant value to the NH-U12S’s overall package.

Which should you buy?

If you prioritise maximum cooling performance and value for money, the Thermalright Peerless Assassin 120 Black at C$54.90 offers a compelling package with its dual-tower, dual-fan design and extensive socket support. It excels in raw heat dissipation and airflow, making it ideal for users with high-TDP CPUs who can accommodate its size. Conversely, if you prefer a quieter, more compact cooler with premium build quality, excellent installation ease, and a solid warranty, the Noctua NH-U12S at C$79.95 is the better choice. Its slim profile avoids compatibility issues with RAM and PCIe slots, while its fan and mounting system are optimised for silent operation. Ultimately, your decision hinges on whether raw cooling power or quiet, compact design is your priority.