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Thermalright · Air · 158 mm tall

Thermalright Peerless Assassin 140 SE ARGB

2 fans · 25.6 dBA · RGB

Performance
81%
Perf / price
83
Acoustics
74
Amazon
$43
$43
Available on Amazon Updated Aug 30, 2026 Prime FBA
Performance81.0%
Performance / price83.1
Acoustics74.2
$43 on Amazon Cooler table Compare this cooler

Check this cooler in a buildSelect a CPU and case first so socket, height, and radiator support can be evaluated. Start with the CPU

Written analysis

Thermalright Peerless Assassin 140 SE ARGB at a glance

The Thermalright Peerless Assassin 140 SE ARGB is a Air cooler listed as 158 mm tall. It is listed with 2 120 mm fans.

Review-derived relative cooling performance is 81.0%. Recorded noise is 25.6 dBA, for an acoustics score of 74.2. Airflow is listed at 66.2 CFM. Warranty is 5 years.

Best fit: Mainstream and performance desktop builds that need solid review-derived cooling performance.

Fitment and sockets

Tower height is 158 mm — check case cooler clearance before buying. Socket compatibility includes LGA 1700, LGA 1151, LGA 1155, LGA 1156, LGA 1200, LGA 1851, AM4, AM5. CPU block / cold plate: Copper.

Current value

At $43, performance / price is 83.1. Compare nearby coolers of the same type below; quieter acoustics and fitment can outweigh a small score gap.

Cooler data

Full specifications

Cooling type, fitment, sockets, fans, acoustics, features, and value in one technical sheet.

General

Manufacturer
Thermalright
Cooler
Thermalright Peerless Assassin 140 SE ARGB
Warranty
5 years
Launch price
Amazon price
$43
Amazon availability
Available
Price updated
Aug 30, 2026

Cooling type & fit

Type
Air
Size class
158 mm tall
Height
158 mm
Cooler dimensions
140 x 132 x 158 mm

Value

Amazon price
$43
Relative performance
81.0%
Performance / price
83.1
Acoustics
74.2

Sockets & block

Socket compatibility
LGA 1700, LGA 1151, LGA 1155, LGA 1156, LGA 1200, LGA 1851, AM4, AM5
CPU block
Copper

Fans & acoustics

Fan size
120 mm
Fan count
2
Fan speed
1500 rpm
Noise
25.6 dBA
Airflow
66.2 CFM
Acoustics score
74.2

Features

RGB lighting
Yes
Thermal paste included
No
Display
0
Color

Amazon

Price history

Nearby performance

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Discussion

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Amazon listing details

Marketplace feature text kept for reference. Structured specifications above are the source for scores and comparisons.

[158mm Heat Dissipation Height]The overall height of the cpu cooling is 158mm, which is compatible with more chassis. The main body is made of all aluminum fins, which can provide a larger heat dissipation area

[Product Specifications] Model: Peerless Assassin 140 SE ARGB, size: 140x160x158mm, heat sink material: aluminum,fan size: 120x120x28mm/140x140x27mm,fan speed: 1850RPM+10%/1500RPM+10%, Wind pressure: 2.21MM H2O, operating noise≤29.5db (A)/25.6db (A), fan interface: 4pin pwm, Fan light interface: 5V 3pin ARGB, Combined with 2 pwm fans, can bring good heat dissipation effect.

[AGHP Heat Pipe Technology]The 6x6mm heat pipe adopts AGHP technology, which can solve the impact of reverse gravity caused by vertical/horizontal installation orientation. Precision micro carving reflow soldering with nickel plated copper base, combined with nickel plated anti-oxidation heat pipes, improves the heat dissipation effect. DTPC is 275W.

[Detail Optimization] The cpu cooler comes with a 1-to-2-wire pwm control line, and the dual fans can achieve PWM synchronous speed control. The accompanying SS2 buckle is compatible with multiple specifications and can accommodate multiple CPU models. It is easy to install and remove, and easy to maintain and upgrade.

[Wide Compatibility] Heat sink compatible with dual platform slots: Intel LGA 1851/1700/1150/1151/1155/1156/1200; AMD: AM4/AM5; The radiator comes with installation accessories, which can be installed according to the installation video or manual. (Note: Installing AMD platform requires using the original motherboard backplane for installation).