vsversusfinder

Thermalright Peerless Assassin 120 SE CPU Cooler vs Thermalright Assassin X 90 SE V2 CPU Cooler

Updated August 2026The Thermalright Peerless Assassin 120 SE offers superior cooling performance and aesthetics, making it the better choice for high-performance builds. However, the Assassin X 90 SE V2 is a more budget-friendly option for compact setups.

The Thermalright Peerless Assassin 120 SE offers superior cooling performance and aesthetics, making it the better choice for high-performance builds. However, the Assassin X 90 SE V2 is a more budget-friendly option for compact setups.

Why Thermalright Peerless Assassin 120 SE CPU Cooler is better

Cooling Performance

Higher airflow and more heat pipes

Aesthetic Appeal

Features ARGB lighting

Dimensions

Larger heatsink for better cooling

Why Thermalright Assassin X 90 SE V2 CPU Cooler is better

Price

More affordable option

Compact Size

Fits in tighter spaces

Noise Level

Slightly quieter operation

Overall score

Thermalright Peerless Assassin 120 SE CPU Cooler
85
Thermalright Assassin X 90 SE V2 CPU Cooler
70

Specifications

SpecThermalright Peerless Assassin 120 SE CPU CoolerThermalright Assassin X 90 SE V2 CPU Cooler
Heat Pipes6x6mm4x6mm
Airflow66.17 CFM32.77 CFM
Noise Level25.6 dB(A)23.85 dB(A)
Socket SupportLGA1150/1700/AM4/AM5LGA1150/AM4/AM5
PriceC$48.90C$24.90

Dimension comparison

Thermalright Peerless Assassin 120 SE CPU CoolerThermalright Assassin X 90 SE V2 CPU Cooler

Brand Overview

Both the Thermalright Peerless Assassin 120 SE CPU Cooler and the Thermalright Assassin X 90 SE V2 CPU Cooler come from Thermalright, a brand with over 20 years of experience in computer cooling solutions. The Peerless Assassin 120 SE is designed for high performance with its dual tower heatsink configuration, while the Assassin X 90 SE V2 targets compact builds with its smaller dimensions. This distinction in design reflects the brands' commitment to catering to various user needs.

Design and Dimensions

The Thermalright Peerless Assassin 120 SE features a dual tower heatsink measuring 125mm x 135mm x 155mm, providing a robust cooling solution suited for larger cases. In contrast, the Assassin X 90 SE V2 is more compact, with dimensions of 94mm x 77mm x 118mm. This smaller size allows the latter to fit into tighter spaces, making it an excellent choice for compact builds where height restrictions are a concern.

Cooling Technology

When it comes to cooling technology, the Peerless Assassin 120 SE utilises six 6mm heat pipes with AGHP technology to maximise heat transfer efficiency. This model also features two high-performance ARGB fans that operate at a maximum speed of 1550 RPM and can generate an airflow of 66.17 CFM. The Assassin X 90 SE V2, on the other hand, uses four 6mm heat pipes and a single PWM fan that spins up to 2200 RPM, producing an airflow of 32.77 CFM. While the X 90 SE V2 has a higher fan speed, its smaller airflow capacity means that the Peerless Assassin 120 SE is likely to provide superior cooling performance under load.

Noise Levels

Noise levels are an important consideration for many users. The Thermalright Peerless Assassin 120 SE has a maximum noise level of 25.6 dB(A), making it a relatively quiet option for gaming and productivity tasks. In comparison, the Assassin X 90 SE V2 operates at a slightly quieter level of 23.85 dB(A) at full speed. While both coolers are designed to operate quietly, the Assassin X 90 SE V2 may be preferable for users prioritising silence alongside performance.

Installation and Compatibility

Installation compatibility is crucial for ensuring that the cooler fits with various CPU sockets. The Peerless Assassin 120 SE supports Intel sockets LGA 1150, 1151, 1155, 1156, 1200, 1700, and 1851, as well as AMD's AM4 and AM5 sockets. However, it requires the original motherboard's built-in backplate for installation on AM4 and AM5, which is not included. The Assassin X 90 SE V2 also supports Intel 1150, 1151, 1155, 1156, and 1200, along with AMD AM4 and AM5. Both models offer similar compatibility, but the installation requirements for the Peerless may necessitate additional attention from users.

Aesthetic Appeal

Aesthetics can play a significant role in a build, especially for gamers and PC enthusiasts who want their systems to look as good as they perform. The Peerless Assassin 120 SE boasts colourful ARGB lighting effects, adding a vibrant touch to any setup. The Assassin X 90 SE V2 lacks these visual enhancements, focusing instead on a more utilitarian design. If visual flair is important to you, the Peerless Assassin 120 SE will likely be the more appealing choice.

Price Comparison

Price is often a deciding factor when choosing between products. The Thermalright Peerless Assassin 120 SE is priced at C$48.90, while the Assassin X 90 SE V2 is significantly more affordable at C$24.90. This C$24 difference may be substantial for budget-conscious consumers, especially considering that the Assassin X 90 SE V2 still offers decent performance despite being the less expensive option.

Which should you buy?

In conclusion, the decision between the Thermalright Peerless Assassin 120 SE and the Assassin X 90 SE V2 ultimately hinges on your specific needs and preferences. If you require superior cooling performance, compatibility with a wide range of CPU sockets, and an eye-catching design, the Peerless Assassin 120 SE is the better choice, albeit at a higher price point. Conversely, if you’re looking for a compact cooler that offers good performance at a lower price, the Assassin X 90 SE V2 is a sensible option. Consider your build requirements and budget to make the most informed decision.

versusfinder.com is a participant in the Amazon.ca Associates Program. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.

Thermalright Peerless Assassin 120 SE CPU Cooler vs Thermalright Assassin X 90 SE V2 CPU Cooler | versusfinder