Thermalright Peerless Assassin 120 SE Dual-Fan CPU Air Cooler

The Thermalright Peerless Assassin 120 SE is a dual-fan air cooler with six heat pipes and support listed for several Intel and AMD sockets. Its stated height is 15.5 cm, so check case clearance and the exact socket mounting parts before buying.

At a glance

Dual-tower heatsink design with two 120 mm PWM fans and six heat pipes, according to the listing.
Socket support is listed for AM4 and AM5, plus multiple Intel sockets.
The stated cooler height is 155 mm. Check case clearance before installation.
An asymmetrical offset layout is described as leaving space for the first graphics card slot.

Price

€31.12Save 20%

Reference price: ~~€38.90~~

Price checked: 12 Nov 2026

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Pros and cons

Pros

Two included 120 mm PWM fans and six heat pipes provide a substantial air-cooling configuration.
Broad listed support for older and newer Intel and AMD socket families.
Listing describes an offset layout intended to preserve space around the first graphics card slot.

Technical specifications

17 specifications

Identity
Brand	THERMALRIGHT

Cooling and fans
Cooling method	Air
Heat pipes	6 x 6 mm heat pipes
Fan configuration	2 PWM fans
Fan model	TL-C12C
Fan dimensions	120 x 120 x 25 mm (4.72 x 4.72 x 0.98 inches)
Maximum fan speed	1550 rpm ± 10%
Airflow	66.17CFM(MAX)
Noise level	≤ 25.6 dB(A)
Power connection	4 pin
Voltage	12V

Compatibility
Intel sockets listed	Intel:1150/1151/1155/1556/1200/1700/17XX
AMD sockets listed	AMD:AM4/AM5

Dimensions and installation
Cooler dimensions	125(L)x135(W)x155(H)mm (4.92x5.31x6.1 inches)
Weight listed	2.14 Pounds

Materials and protection
Material listed	Aluminum
Heat-pipe technology	AGHP 3.0 technology

What to know before buying

Listing details to confirm

The title and detailed socket list do not match exactly: the title includes LGA1851, while the detailed compatibility list names 17XX and does not explicitly list LGA1851. Confirm socket support and the mounting kit for your exact platform. The listing gives dimensions in both centimetres and millimetres with matching stated measurements, and describes the heat-pipe construction and material inconsistently across sections. The 265 watts figure is presented as wattage without explaining what it measures, so do not treat it as a verified CPU cooling limit.

Who is it for?

A good fit for

Desktop PC builders who want a dual-fan air cooler and whose socket is confirmed against the supplied mounting hardware.
Buyers who can accommodate a cooler stated to be 155 mm tall and want two PWM fans.

Less suited to

Builders whose case cannot accommodate a 155 mm-tall cooler.
Buyers who need confirmed LGA1851 support without checking the exact mounting kit.

Thermalright Peerless Assassin 120 SE Dual-Fan CPU Air Cooler · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.7 / 5 · 1,487 ratings

5 stars84%84%
4 stars11%11%
3 stars3%3%
2 stars1%1%
1 star1%1%

Customer feedback describes strong air-cooling performance and quiet operation, with some buyers saying it is sufficient for a Ryzen 5 7600X. Customers also report mixed experiences with the supplied thermal paste, including reports that it was dry. This feedback may help buyers weigh the cooler’s dual-fan configuration against uncertainty about the compound, but it does not establish performance for every CPU or build.

Positive themes

Customers report strong cooling performance and quiet operation.

Negative themes

Some customer feedback reports that the supplied thermal paste was dry.

Frequently asked questions

Which CPU sockets are listed as compatible?

The detailed listing names AMD AM4 and AM5, plus Intel 1150, 1151, 1155, 1556, 1200, 1700 and 17XX. The title also mentions LGA1851, so confirm support and the correct mounting parts for your socket.

How much clearance does the cooler need?

The listing gives a height of 155 mm. Check your case’s CPU cooler clearance, along with space around the memory and graphics card.

What is included with the cooler?

The supplied product details mention two TL-C12C PWM fans and thermal compound, but do not provide an explicit package inventory. Check the selected listing for the included items.