Thermalright Peerless Assassin 140 SE Dual-Tower CPU Cooler, 6 Heat Pipes

The Thermalright Peerless Assassin 140 SE is a dual-tower air CPU cooler with six heat pipes and two PWM fans. Its listed dimensions are 140 x 160 x 158 mm with fans, so check case clearance and memory space before buying.

At a glance

Dual-tower heatsink paired with one 120 mm and one 140 mm PWM fan, according to the listing.
PWM fans can adjust speed according to motherboard temperature, as claimed by the listing.
Socket compatibility is listed for AM4 and AM5, plus selected Intel LGA sockets.

Price

€35.92Save 20%

Reference price: ~~€44.90~~

Price checked: 12 Nov 2026

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Pros and cons

Pros

Two PWM fans of different sizes are specified, with separate speed, airflow and noise figures.
The listed socket range covers AM4 and AM5 as well as several Intel LGA generations.

Technical specifications

20 specifications

Identity
Brand	Thermalright
Model	Peerless Assassin 140 SE

Cooling and fans
Cooling method	Air
Heat pipes	6 fully electroplated anti-oxidation heat pipes
120 mm fan speed	1850RPM ± 10%
140 mm fan speed	1500RPM ± 10%
120 mm fan airflow	88.89 CFM
140 mm fan airflow	77.8CFM
120 mm fan noise	≤ 29.5 dbA
140 mm fan noise	≤ 25.6 dbA
Fan connector	4pin PWM
120 mm fan air pressure	2.21 mm H2O
140 mm fan air pressure	2.09 mm H2O
Fan bearing	S-FDB

Compatibility and fit
Supported Intel sockets	Intel LGA 1851/1700/1150/1151/1155/1156/1200
Supported AMD sockets	AM4/AM5
Dimensions with fans	140 x 160 x 158 mm

Materials and electrical
Material listed	Aluminum
Voltage	12 Volts (DC)
Compatible devices	Desktop

What to know before buying

The listing gives two fan sizes and separate operating figures, but also shows a single 1850 RPM and 29.5 dB specification without tying those figures to a fan. Treat the individual fan figures as listing claims, not verified measurements. Confirm socket support, case clearance and memory fit for your build. AMD installation is stated to require the original motherboard backplane.

What’s in the box

Included

CPU cooler

Who is it for?

A good fit for

Desktop builders who want a dual-tower air cooler and have space for the listed 140 x 160 x 158 mm dimensions.
Buyers using a listed AM4, AM5 or Intel LGA socket who can confirm fit with their motherboard and case.

Less suited to

Builds where the case cannot accommodate the listed cooler dimensions or clearance is uncertain.

Thermalright Peerless Assassin 140 SE Dual-Tower CPU Cooler, 6 Heat Pipes · photo 2 — Additional product photo 2

Customer reviews on Amazon

5 / 5 · 1 ratings

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Only aggregate rating information is available, based on a single rating, so it offers very limited evidence about how buyers experience the cooler. It cannot establish consistent cooling, noise or installation results. Use the listed dimensions, socket support and fan specifications to assess fit and suitability instead.

Frequently asked questions

Which processor sockets are listed as compatible?

The listing names AMD AM4 and AM5, plus Intel LGA 1851, 1700, 1150, 1151, 1155, 1156 and 1200. Confirm your exact motherboard and installation requirements before purchase.

How large is the cooler?

The stated size with fans is 140 x 160 x 158 mm. Check your case and nearby component clearances against those dimensions.

What fans does it use?

The listing specifies one 120 mm fan and one 140 mm fan with 4-pin PWM connections. It gives separate speed, airflow and noise figures for each.