Specifications

Dimension: L125 mm × W110 mm × H155 mm
Weight: 730 g
Heat Pipes: 6 mm heatpipe × 6 units
Copper Base: C1100 pure copper nickel‑plated
Fan Dimension: L120 mm × W120 mm × H25 mm
Fan Weight: 120 g
Rated Speed: 1550 RPM ±10% (MAX)
Noise Level: 25.6 dBA
Air Flow: 66.17 CFM (MAX)
Air Pressure: 1.53 mm H₂O (MAX)
Ampere: 0.20 A
Connector: 4‑Pin PWM fan connector
Bearing Type: S‑FDB bearing
Supported Intel CPUs: 115X / 1200 / 1700 / 1851
Supported AMD CPUs: AM4 / AM5

Photos

The product is a black Thermalright Peerless Assassin 120 SE cooling fan, shown from a three-quarter angle with visible fins and mounting points.

The image shows a black and silver cooling product with multiple fins, photographed from the front.

What reviewers say

The GamersNexus review praises the Thermalright Peerless Assassin 120 SE as a competitively priced, high‑performance air cooler that delivers excellent cooling for its $41 price point. The reviewer highlights its solid build quality, strong performance in benchmark tests, and good value compared to higher‑priced rivals.
gamersnexus.net ↗
The Thermalright Peerless Assassin 120 SE delivers outstanding cooling performance for its price, consistently outperforming many competitors—including high‑end AIOs—in a range of stress tests. It remains very quiet even at full fan speed and performs exceptionally well under lower wattage loads with reduced fan speeds.
www.tomshardware.com ↗
The Thermalright Peerless Assassin 120 SE is highlighted as the best‑value CPU air cooler in 2026, offering performance close to premium models like the Noctua NH‑D15 at roughly one‑third of the price. It features a dual‑tower design with six heat pipes and two 120mm PWM fans that keep mid‑range to high‑end gaming CPUs cool and quiet. The build quality is solid, installation takes about ten minutes, and it supports modern AMD AM5 and Intel LGA 1700/1851 sockets. The reviewer notes the lack of RGB lighting and suggests stepping up only for extreme overclocking or if RGB is desired.
thermalbeast.com ↗
ChoiceCheck praises the Thermalright Peerless Assassin 120 SE as a budget-friendly yet powerful air cooler that delivers impressive cooling performance, quiet operation, and solid build quality, making it an excellent choice for gamers and enthusiasts looking to upgrade from stock coolers without breaking the bank.
www.choicecheck.org ↗
The review notes that the Peerless Assassin 120 SE has an acceptable build quality for its price point, with no sharp edges and a good paint finish on the upper fins. Minor visual blemishes are present on the cooler base and aluminum fins but are deemed unnoticeable when installed.
basic-tutorials.com ↗
PC Gamer’s review praises the Thermalright Peerless Assassin 120 SE as a superb, affordable cooler that delivers excellent performance and solid build quality, though it notes the unit is slightly larger than some rivals and can be a bit louder.
www.pcgamer.com ↗

Our take

Based on 6 reviews

Five of six reviews agree the Thermalright Peerless Assassin 120 SE delivers strong cooling and quiet operation at its price, with GamersNexus, Tom's Hardware, ThermalBeast, ChoiceCheck, and PC Gamer highlighting its value and temperature management for mid-range to high-end CPUs. Basic-Tutorials also notes acceptable build quality for the price.

Reviews split on noise and size: PC Gamer notes it can be louder and larger than rivals, while Tom's Hardware states it remains very quiet at full speed. Basic-Tutorials mentions minor visual blemishes. For buyers, this means exceptional performance-to-cost ratio, but those prioritizing absolute silence or compact dimensions should weigh the trade-offs.