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Thermalright · Air · 155 mm tall

Thermalright Peerless Assassin 120 SE

2 fans · 25.6 dBA · RGB

Performance
82%
Perf / price
103
Acoustics
74
Amazon
$35
$35
Available on Amazon Updated Aug 30, 2026 Prime FBA
Performance82.0%
Performance / price103.4
Acoustics74.2
$35 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 120 SE at a glance

The Thermalright Peerless Assassin 120 SE is a Air cooler listed as 155 mm tall. It is listed with 2 120 mm fans.

Review-derived relative cooling performance is 82.0%. Recorded noise is 25.6 dBA, for an acoustics score of 74.2. Airflow is listed at 66.17 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 155 mm — check case cooler clearance before buying. Socket compatibility includes LGA 1700, LGA 1151, LGA 1155, LGA 1156, LGA 1200, AM4, AM5. CPU block / cold plate: Copper.

Current value

At $35, performance / price is 103.4. 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 120 SE
Warranty
5 years
Launch price
$36
Amazon price
$35
Amazon availability
Available
Price updated
Aug 30, 2026

Cooling type & fit

Type
Air
Size class
155 mm tall
Height
155 mm
Cooler dimensions
125 x 110 x 155mm

Value

Amazon price
$35
Relative performance
82.0%
Performance / price
103.4
Acoustics
74.2

Sockets & block

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

Fans & acoustics

Fan size
120 mm
Fan count
2
Fan speed
1850 rpm
Noise
25.6 dBA
Airflow
66.17 CFM
Acoustics score
74.2

Features

RGB lighting
Yes
Thermal paste included
No
Display
Color
PA120 SE

Additional information

Also listed as
SE120

Amazon

Price history

Nearby performance

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Discussion

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Vendor copy

Amazon listing details

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

[Brand Overview] Thermalright is a Taiwan brand with more than 20 years of development. It has a certain popularity in the domestic and foreign markets and has a pivotal influence in the player market. We have been focusing on the research and development of computer accessories. R & D product lines include: CPU air-cooled radiator, case fan, thermal silicone pad, thermal silicone grease, CPU fan controller, anti falling off mounting bracket, support mounting bracket and other commodities

[Product specification] Thermalright PA120 SE; CPU Cooler dimensions: 125(L)x135(W)x155(H)mm (4.92x5.31x6.1 inch); heat sink material: aluminum, CPU cooler is equipped with metal fasteners of Intel & AMD platform to achieve better installation, double tower cooling is stronger((Note:Please check your case and motherboard for compatibility with this size cooler.)

【2 PWM Fans】TL-C12C; Standard size PWM fan:120x120x25mm (4.72x4.72x0.98 inches); fan speed (RPM):1550rpm±10%; power port: 4pin; Voltage:12V; Air flow:66.17CFM(MAX); Noise Level≤25.6dB(A), leave room for memory-chip(RAM), so that installation of ice cooler cpu is unrestricted

【AGHP technique】6×6mm heat pipes apply AGHP technique, Solve the Inverse gravity effect caused by vertical / horizontal orientation, 6 pure copper sintered heat pipes & PWM fan & Pure copper base&Full electroplating reflow welding process, When CPU cooler works, match with pwm fans, aim to extreme CPU cooling performance

【Compatibility】The CPU cooler Socket supports: Intel:115X/1200/1700/17XX AMD:AM4;AM5; For different CPU socket platforms, corresponding mounting plate or fastener parts are provided(Note: Toinstall the AMD platform, you need to use the original motherboard's built-in backplanefor installation, which is not included with this product)