Thermalright Peerless Assassin 120 White ARGB CPU Cooler - Quiet

In this review of the Thermalright Peerless Assassin 120 White ARGB, the bottom line is simple: it is a well engineered twin-tower air cooler that targets mainstream and high-performance desktop builders who want strong thermal performance without high noise. The reviewer found the cooler especially compelling for AMD AM4/AM5 and Intel 12th/13th generation users who need a compact footprint that still delivers on cooling, thanks to the twin aluminum towers, six sintered copper heat pipes and a PWM ARGB fan set that balances airflow and quiet operation.

Key Features

• Double tower heatsink: The offset asymmetrical aluminum twin towers increase surface area and allow installation without blocking the first PCIe slot, giving good clearance for memory and GPUs.
• Six heat pipes with AGHP: Six pure copper sintered heat pipes use AGHP technology to reduce inverse-gravity heat transfer issues and support a high 245W TDP for demanding CPUs.
• Dual PWM fans: Two TL-C12W-S 120mm PWM fans provide up to 66.17 CFM airflow at a max 1500 RPM while keeping noise around 25.6 dB(A) for quiet daily use.
• White nano coating: A full electroplating reflow welding process and nanoscale white paint finish give the cooler a finished look and a large effective dissipation area of 9600 cm2.
• ARGB lighting: High-brightness atomizing fan blades diffuse the ARGB for softer lighting and motherboard sync, adding visual polish to an otherwise performance-first cooler.

Who It's For

The Peerless Assassin 120 White ARGB is aimed at PC builders who need strong CPU cooling in a mid-tower case without sacrificing the first PCIe slot or RAM clearance; owners of Ryzen 5000 series and Intel 12th/13th generation CPUs will find the thermal headroom valuable. It is also a good fit for users who prefer an all-white aesthetic and motherboard-synced ARGB lighting while keeping noise levels low.

Users who require the absolute smallest low-profile coolers or those chasing extreme overclocking on very high core-count HEDT processors may want to look at larger air towers or liquid solutions, but for mainstream high-performance desktop builds this cooler is a practical balance of size, noise and cooling power.

Pros & Cons

Pros

• Strong cooling from six sintered copper heat pipes and a 9600 cm2 dissipation area.
• Quiet, high-flow dual 120mm PWM fans that keep noise near 25.6 dB(A) while moving ample air.
• Offset design preserves first PCIe slot and memory clearance for flexible builds.
• Clean white finish with ARGB lighting that integrates with motherboard sync.

Cons

• The twin-tower size requires checking case clearance; it is compact but not low-profile for small form factor cases.
• All-aluminum heatsink cover means the look is premium but not as heavy as full copper alternatives for extreme overclocking.

Specifications

Model	PA120 White ARGB / Peerless Assassin 120
Dimensions	125 x 135 x 157 mm (L x W x H)
Fans	2 x TL-C12W-S 120 x 120 x 25 mm PWM, 1500 RPM max
Airflow / Noise	66.17 CFM max / 25.6 dB(A)
Heat pipes / Base	6 pure copper sintered heat pipes with pure copper base
Heat dissipation area	9600 cm2
Socket compatibility	Intel LGA 1700/1200/115x/2011/2066/1851 and AMD AM4/AM5

Our Verdict

The Thermalright Peerless Assassin 120 White ARGB is an excellent value for builders who want a quiet, high-flow twin-tower cooler with good clearance and attractive white styling. It delivers solid temperatures for mainstream high-performance CPUs, easy installation with included metal fasteners for Intel and AMD platforms, and tasteful ARGB-making it a sensible choice for most desktop gaming and productivity rigs.

Frequently Asked Questions

Will this fit my AM4 or AM5 motherboard?
Yes, the cooler ships with mounting plates and fasteners for both AMD AM4 and AM5 sockets and supports a wide range of Intel sockets as well.

How loud are the fans under load?
The dual TL-C12W-S PWM fans run up to about 1500 RPM and are rated around 25.6 dB(A), which tests show to be quiet under typical gaming and productivity loads.

Does the cooler block the first PCIe slot?
No, the offset asymmetric twin-tower layout is designed to leave room for the first PCIe slot and memory modules, improving compatibility with graphics cards and tall RAM.