Thermalright (サーマルライト) Peerless Assassin 120 SE CPUエアクーラー デュアルタワー6ヒートパイプ デュアル120mm TL-C12C PWM CPUファン AMD AM4

This article covers Thermalright (サーマルライト) Peerless Assassin 120 SE CPUエアクーラー デュアルタワー6ヒートパイプ デュアル120mm TL-C12C PWM CPUファン AMD AM4.

Overview

The Thermalright Peerless Assassin 120 SE is a dual-tower CPU air cooler that punches far above its price point. Featuring six 6mm nickel-plated heat pipes and two 120mm PWM fans (TL-C12C), it delivers up to 265W of TDP cooling capacity while remaining whisper-quiet at idle. Compatible with Intel LGA1700/1200/115X and AMD AM5/AM4 sockets, this cooler has become a favorite among budget-conscious enthusiasts and mainstream builders alike. Its sub-$40 street price makes it one of the best value air coolers on the market today.

Connectivity & Compatibility

The cooler includes full mounting kits for both Intel and AMD platforms out of the box. Intel support covers LGA1700, LGA1200, and LGA115X; AMD support covers AM5 and AM4. At 155mm tall, it fits inside most mid-tower cases, but always double-check your case's maximum CPU cooler height clearance. The two fans connect via 4-pin PWM headers, allowing the motherboard to control fan speeds automatically. RAM clearance is good thanks to the fan offset design — the front fan sits above the memory slots, so tall heatsinks (up to approximately 44mm) are generally not obstructed.

Product Info

Released in 2022, the Peerless Assassin 120 SE typically retails between 12,000 and 14,000 yen in Japan ($30–$40 USD). Thermalright, a Taiwanese brand with over two decades of thermal engineering experience, positions this cooler squarely in the mid-high performance tier. It comes with two TL-C12C fans, mounting hardware for all major sockets, a tube of thermal paste, and an AMD offset mounting bracket. While the warranty period isn't explicitly stated on the product page, 's A-to-Z guarantee provides buyer protection. This cooler has earned a reputation for beating many competitors at twice the price in thermal performance.

Best Use Cases

First, gaming PCs: the PA120 SE can easily handle CPUs like the Core i5-13600K or Ryzen 7 7800X3D under full gaming loads without thermal throttling. Second, budget-to-midrange workstations: if you're building a content creation rig with a Ryzen 9 or Core i7, this cooler provides ample headroom for sustained all-core workloads. Third, first-time PC builders who prefer air cooling over liquid cooling: the installation is straightforward, the cooler is relatively lightweight, and there's zero risk of pump failure or leaks. If you value simplicity and reliability, this is an excellent choice.