Thermalright Peerless Assassin 120 CPU Air Cooler - Dual 120mm Fans

In this review the Thermalright Peerless Assassin 120 is evaluated for mainstream builders who want strong cooling without a large tower footprint. The bottom line: it delivers notable temperature drops on both AMD and Intel systems thanks to a 6-heat-pipe design, full electroplating reflow welding and dual 120mm PWM fans while remaining reasonably quiet. This makes it a solid choice for gamers and content creators who need reliable cooling up to high TDPs without blocking the first PCIe slot.

Key Features

• 6 Heat Pipes: Six pure copper sintered heat pipes provide direct and efficient heat transfer to the aluminium fin stack to lower CPU temperatures under sustained load.
• Dual PWM Fans: Two TL-C12 120mm PWM fans run up to 1500 RPM for a balance of airflow and low noise, moving up to 66.17 CFM while keeping noise around 25.6 dB(A).
• AGHP Technology: The 66mm heat pipes use AGHP technique to reduce inverse gravity effects, improving cooling consistency in different case orientations.
• Offset Asymmetric Layout: The cooler is offset so it can be installed without blocking the first graphics card slot on many motherboards, preserving GPU compatibility.
• Wide Compatibility: Includes metal mounting hardware for Intel sockets including LGA 1700 and LGA 1200 plus AMD AM4/AM5, making it a flexible upgrade for diverse systems.

Who It's For

This cooler is best for PC builders who want a compact dual-tower air cooler that punches above its size class. Gamers and workstation users with mid to high TDP CPUs such as Ryzen 5000 series or Intel 12th/13th generation will appreciate the cooling headroom and quiet fan profile.

It may not be ideal for users seeking the absolute smallest low-profile solution or those who prefer closed-loop liquid cooling for extreme overclocking headroom; very large memory with tall heatspreaders should also be checked for clearance despite the cooler leaving room around the memory area.

Pros & Cons

Pros

• Strong thermal performance from six heat pipes and a double-tower aluminium heatsink.
• Quiet operation while providing good airflow, noted by users as effective with 5800X and 12700K CPUs.
• Asymmetric offset design helps maintain compatibility with the first PCIe slot and leaves room around RAM.
• Solid build quality with electroplating reflow welding and metal fasteners for multiple sockets.

Cons

• At 1.02 kg and 157 mm height it is not a low-profile cooler and requires case clearance planning.
• Fan top speed is moderate; extreme overclockers may prefer higher airflow or a liquid solution for maximum headroom.

Specifications

Model	PA120
Dimensions	125 x 135 x 157 mm
Heat Sink Material	Aluminium double-tower
Heat Pipes	6 pure copper sintered heat pipes
Fans	2 x 120 x 120 x 25 mm TL-C12 PWM fans, 1500 RPM
Air Flow	66.17 CFM (max)
Noise Level	25.6 dB(A)

Our Verdict

The Peerless Assassin 120 is a well-rounded air cooler that offers excellent value for most builders: it combines a robust six-heat-pipe design, dual PWM fans and smart layout choices to deliver effective cooling for mainstream and high-performance CPUs while staying quiet. It is a particularly good pick when you need GPU clearance and reliable performance without stepping up to a large AIO.

Frequently Asked Questions

Will this cooler fit AM4 and AM5 sockets?
Yes. The package includes metal mounting hardware compatible with AMD AM4 and AM5 as well as a range of Intel sockets.

Does the cooler block the first PCIe slot?
No. The offset asymmetric layout is designed to allow installation without blocking the first graphics card slot on typical motherboards.

Is it suitable for high TDP CPUs?
Yes. With six heat pipes, AGHP technique and a listed TDP capability of around 245W, it handles mid to high TDP processors effectively when installed in a case with normal airflow.