This article covers Thermalright (サーマルライト) Peerless Assassin 120 Mini White CPUエアクーラー ヒートパイプ6本 120mm TL-D12W PWMファン 高さ135mm ダブルタワークーラー AMD AM4 AM5.

Overview

The Thermalright Peerless Assassin 120 Mini White (PA120 MINI WHITE) is a compact dual-tower CPU cooler standing just 135mm tall. While most standard dual-tower coolers exceed 155mm, this model was designed with case compatibility in mind, especially for Mini-ITX builds. It clears the side panels of many popular small form factor cases while still delivering solid cooling performance. Equipped with six 6mm heat pipes and a 120mm PWM fan (TL-D12W), this cooler can handle CPUs up to around 200W TDP. The white finish gives it a clean aesthetic that fits well in white-themed builds. It supports the latest sockets including AM5 and LGA1851, making it a future-proof choice for current platforms.

Connectivity & Compatibility

Socket support covers Intel LGA1851/1700/1200/115x/2011/2066 and AMD AM5/AM4, so it works with virtually any modern mainstream desktop CPU. The included mounting kit provides brackets and fasteners for each socket, and the installation process is straightforward. The fan connects via a standard 4-pin PWM header, allowing the motherboard to control fan speed. Fan size is 120x120x25mm, which is widely compatible with aftermarket fans if you wish to replace it later. Thanks to its 135mm height, it fits inside many compact cases like the Cooler Master NR200, Fractal Design Terra, and Lian Li A4-H2O without clearance issues. However, memory height should be considered: the fan sits offset forward, so standard-height RAM (under 44mm) imposes no problem, but tall RGB memory modules may require moving the fan clips upward or using a different fan orientation.

Product Info

Released in late 2023, the Thermalright Peerless Assassin 120 Mini White is widely available through and other retailers, typically priced around ¥14,800. It sits firmly in the mid-range tier: it outperforms single-tower budget coolers while costing significantly less than premium large dual-tower options or AIO liquid coolers. The warranty is 2 years from the manufacturer. Accessories include mounting kits for Intel and AMD sockets, fan clips, thermal paste, and a manual.

Best Use Cases

Mini-ITX / SFF Builders: The primary target audience. If you want strong air cooling in a compact case, this cooler is one of the best options available. It fits in most ITX cases that can accommodate a 120mm fan, and provides enough headroom for mid-range CPUs like Ryzen 5 or Core i5. White-Themed PC Enthusiasts: The all-white design (radiator and fan) looks fantastic in white builds. For builders who care about aesthetics without sacrificing cooling, this cooler delivers a clean look. Budget-Conscious Gamers & Creators: Need good cooling for a Ryzen 7 or Core i7 without spending a lot? This cooler offers excellent value. It’s quiet enough for daily use and keeps temperatures under control during gaming or rendering sessions. Who should look elsewhere?: Users running high-TDP CPUs like Ryzen 9 or Core i9 (especially under all-core loads) may find this cooler insufficient. Also, those who demand absolute silence or low noise might prefer larger coolers with 140mm fans. Finally, if you already own a top-tier air cooler or AIO, there's little reason to swap.

Product Disclosure (Amazon)

  • Manufacturer: ウエスタンデジタル(Western Digital)
  • Seller: TMグッドプライスマート
  • Fulfilled by: TMグッドプライスマート
  • ASIN: B083JXTH5L
  • Note: This article covers a manufacturer-made product based on Amazon listing details.