Thermalright Peerless Assassin 120 SE CPU Cooler, vs Thermalright Peerless Assassin 120 SE V3 CPU Air
Updated August 2026 — Thermalright Peerless Assassin 120 SE CPU Cooler, wins on noise level, Thermalright Peerless Assassin 120 SE V3 CPU Air wins on build quality and cooling performa.
The Thermalright Peerless Assassin 120 SE V3 offers superior cooling performance and better airflow at a lower price, making it the better choice overall.
Why Thermalright Peerless Assassin 120 SE CPU Cooler, is better
Lower Noise
Peerless Assassin 120 SE operates at 25.6 dB.
Price
Peerless Assassin 120 SE is cheaper at $49.99.
Brand Reputation
Thermalright has a long-standing reputation.
Why Thermalright Peerless Assassin 120 SE V3 CPU Air is better
Fan Speed
Peerless Assassin 120 SE V3 fans reach 2000 RPM.
Airflow
Peerless Assassin 120 SE V3 has 70.84 CFM.
Build Quality
Peerless Assassin 120 SE V3 features a nickel-plated copper base.
Overall score
Specifications
| Spec | Thermalright Peerless Assassin 120 SE CPU Cooler, | Thermalright Peerless Assassin 120 SE V3 CPU Air |
|---|---|---|
| Heat Pipes | 6x6mm | 6x6mm |
| Material | Aluminum | Aluminum |
| Noise Level | 25.6 dB | 29.8 dB |
| Compatibility | Intel LGA 115X/1200/1700, AMD AM4/AM5 | Intel LGA 1851/1700/1150, AMD AM4/AM5 |
| Price | $49.99 | $35.90 |
Dimension comparison
Introduction
When comparing the Thermalright Peerless Assassin 120 SE CPU Cooler and the Thermalright Peerless Assassin 120 SE V3 CPU Air Cooler, it’s essential to consider their features, pricing, and overall performance. Both coolers belong to the same brand and share a similar design philosophy, but they have distinct specifications that appeal to different users.
Design and Build Quality
The Thermalright Peerless Assassin 120 SE features a dual-tower design with a robust aluminum construction. Its dimensions are 125mm x 135mm x 155mm, making it a compact yet powerful option for various builds. It comes equipped with dual 120mm PWM fans that operate at a speed of 1550 RPM, promoting effective heat dissipation. On the other hand, the Peerless Assassin 120 SE V3 also boasts a double-tower design but enhances the build quality with a blackened anodic matte top sheet and a nickel-plated copper base. The V3's fans can reach up to 2000 RPM, providing a higher airflow rate of 70.84 CFM compared to the SE’s 66.17 CFM. Therefore, while both models are well-constructed, the V3 offers advanced materials and superior fan performance.
Cooling Performance
In terms of cooling capabilities, the Thermalright Peerless Assassin 120 SE employs AGHP technology with six 6mm heat pipes to deliver efficient thermal management. This cooler ensures effective heat dissipation, particularly for moderate overclocking scenarios. The Peerless Assassin 120 SE V3 takes it a step further with its upgraded AGHP technology, which improves cooling efficiency and reduces the impact of reverse gravity during horizontal installations. With its fans capable of reaching a maximum speed of 2000 RPM, the V3 can handle higher thermal loads more effectively. Thus, the V3 is likely the better choice for users seeking top-tier cooling performance.
Noise Levels
Noise levels are a critical consideration for many users when selecting a CPU cooler. The Thermalright Peerless Assassin 120 SE operates at a noise level of 25.6 dB, making it relatively quiet even under load. In contrast, the Peerless Assassin 120 SE V3 has a slightly higher operational noise level of 29.8 dB due to its faster fans. Although both coolers aim to provide a quiet computing experience, the SE may appeal more to those who prioritize silent operation.
Compatibility
Both coolers are designed to support a wide range of CPU sockets. The Thermalright Peerless Assassin 120 SE is compatible with Intel LGA 115X, 1200, and 1700, as well as AMD AM4 and AM5 sockets. Similarly, the Peerless Assassin 120 SE V3 supports Intel LGA 1851, 1700, and 1150, along with AMD AM4 and AM5. Both coolers come with necessary mounting accessories, but it's important to note that users must use the original backplate from their motherboards for AMD installation. Thus, compatibility is not a major distinguishing factor between the two models.
Pricing
Price is a significant aspect when choosing between these two coolers. The Thermalright Peerless Assassin 120 SE is currently priced at $49.99, while the Peerless Assassin 120 SE V3 is available for $35.90. This makes the V3 approximately 28% cheaper than its predecessor. For budget-conscious consumers, the lower price of the V3 provides a compelling reason to consider it, especially given its enhanced features.
User Experience
Both coolers are designed with user experience in mind, facilitating installation and daily use. The Thermalright Peerless Assassin 120 SE includes metal fasteners for easier installation on both Intel and AMD platforms. The Peerless Assassin 120 SE V3 also emphasizes ease of installation, coming with comprehensive mounting accessories. However, the V3’s improved design and higher performance may offer a more satisfying experience for enthusiasts looking to maximize their cooling potential.
Brand Reputation and Reliability
Thermalright is known for its commitment to quality and innovation in the cooling industry, with over 20 years of experience. Both the Peerless Assassin 120 SE and the Peerless Assassin 120 SE V3 are products of this reputation, ensuring that users can expect reliable performance. While there are no specific bestseller rankings available for these models, the brand's longstanding presence in the market suggests a level of trust and reliability that consumers can count on.
Which should you buy?
Choosing between the Thermalright Peerless Assassin 120 SE and the Peerless Assassin 120 SE V3 ultimately hinges on your specific needs and budget. If you seek superior cooling performance and don’t mind paying a bit more, the V3, priced at $35.90, provides enhanced features and better airflow. However, if you prefer a quieter operation and are willing to invest a bit more for lower noise levels, the original SE at $49.99 could be the right choice. Overall, the V3 emerges as a more versatile and cost-effective option for most users, particularly those engaged in heavier computing tasks.

