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Thermalright · Air · 155 mm tall

Thermalright Peerless Assassin 120 SE Black

2 fans · 25.6 dBA

Performance
81%
Perf / price
92
Acoustics
74
Amazon
$39
Thermalright Peerless Assassin 120 SE Black
View Thermalright Peerless Assassin 120 SE Black Gallery in high resolution
$39
Available on Amazon Updated Aug 30, 2026 Prime FBA
Performance81.0%
Performance / price91.6
Acoustics74.2
$39 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 Black at a glance

The Thermalright Peerless Assassin 120 SE Black is a Air cooler listed as 155 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 66.17 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, LGA 1851, AM4, AM5. CPU block / cold plate: Copper.

Current value

At $39, performance / price is 91.6. 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 Black
Warranty
5 years
Launch price
—
Amazon price
$39
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
$39
Relative performance
81.0%
Performance / price
91.6
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
1550 rpm
Noise
25.6 dBA
Airflow
66.17 CFM
Acoustics score
74.2

Features

RGB lighting
No
Thermal paste included
No
Display
0
Color
—

Amazon

Price history

Nearby performance

Similar coolers

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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.

[Better cooling] Adopting black paint fully electroplated reflow soldering process, the top adopts blackened nano coating+fully electroplated heat pipe+fine micro carved copper bottom, greatly increasing the effective heat dissipation area. memory cut corner avoidance design and can achieve excellent heat dissipation performance during operation.

[Product specification] Model: PA120SE BLACK; CPU heat sink size: 125 (L) x135 (W) x155 (H) mm (4.92x5.31x6.1 inch); Heat sink material: Aluminum, CPU heat sink equipped with metal fasteners from Intel and AMD platforms for better installation, dual tower and dual fan heat dissipation is more powerful.

[Stable output] CPU cooler with high-performance inverted fan with PWM temperature control function, shock-absorbing silicone feet around to reduce fan noise, anti-touch fan blade design to improve safety, and S-FDB bearing is a solution to the fan lifting jitter vibration. The S-FDB bearing solves the problem of fan lifting vibration. It improves the cooling performance to a great extent.

[Dual PWM Fans] TL-C12C Reverse Fan*2; Standard size PWM fan: 120x120x25mm (4.72x4.72x0.98 inches); Fan speed (RPM): 1550rpm±10%; Power interface: 4pin; Voltage: 12V; Air volume: 66.17 CFM (MAX); The noise value is≤25.6dB (A), and dual fans can provide stronger air flow, further improving the heat dissipation effect of the cpu cooler.

[Detailed description] The radiator is equipped with a Y-type adapter cable (one end of 3-pin, one end of 4-pin), which can be very good to connect the two fans in series, to avoid the motherboard interface is not enough. (Note: Installation of AM4 motherboard, you need to use the motherboard original backplane installation)

[Compatibility] CPU cooler slot support: Intel: LGA1150/1151/1155/1156/1200/1700/1851; AMD: AM4/AM5; for different CPU slot platforms, the cooler's mounting kit provides the appropriate mounting plate or fasteners, can be combined with the installation instructions or follow the tutorials to the machine.

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