This article covers Thermalright Peerless Assassin 120 デジタル ARGB ブラック CPUエアクーラー デジタルスクリーントップカバー 6ヒートパイプ コンピューターCPUクーラー AM4.

Overview

Thermalright’s Peerless Assassin 120 Digital ARGB Black is a dual-tower air CPU cooler that combines strong thermal performance with a stylish digital display. Its six 6mm pure copper heat pipes and precision reflow-soldered copper base make direct contact with the CPU for efficient heat transfer. The digital variant features a magnetic top cover with an embedded display, allowing you to monitor CPU temperature and fan speed at a glance. Two 120×120×28mm S-FDB bearing fans spin up to 1850 RPM, delivering 88.89 CFM of airflow while keeping noise at a maximum of 25.6 dB(A). This cooler is well-suited for mid-range to high-end processors and competes directly with flagship air coolers at a lower price point.

Compatibility Guide

Socket support is broad: Intel LGA1851, 1700, 1200, 115x series, and AMD AM4, AM5 all work out of the box. Installation on AMD boards requires the motherboard’s stock backplate (not included). Total height is 162mm, which fits most ATX and larger mATX cases, but narrow or compact ITX builds may hit clearance limits. Because the dual-tower design overhangs the RAM area, tall memory modules with large heatsinks may collide with the front fan or heat pipes. We recommend memory with a height of 40mm or less for trouble-free fitting.

Product Info

The Peerless Assassin 120 Digital ARGB Black launched in early 2025 with a retail price of around ¥9,000–¥10,000 ( Japan). It occupies the mid-high tier of air coolers, offering performance that rivals many 240mm AIO liquid coolers. TDP is rated at approximately 260W, sufficient for CPUs like the Core i9-14900K or Ryzen 9 7950X under full load. The warranty period is typically 1–2 years depending on the seller.

Best Use Cases

  • High-end gaming and workstation PCs: The cooler can handle sustained loads from processors like the Core i7-14700K or Ryzen 7 7800X3D without thermal throttling. The digital display is a handy tool for real-time temperature monitoring during overclocking sessions. - Budget-conscious builders who want performance: Retailing for less than many dual-tower coolers, the Peerless Assassin 120 provides near-Noctua-level cooling without the premium price. It’s also maintenance-free, with no pump to fail. - Aesthetic-focused builds: The all-black design with ARGB fans and a magnetic digital top cover adds a modern, industrial look to any system. The display is fully configurable, showing temperature, fan speed, or custom logos.

Things to Consider

  • RAM clearance: Because of the dual-tower layout, very tall DIMMs (over 40mm) may be blocked by the front fan. You can shift the fan upward by a few millimeters, but that may reduce clearance against the side panel. Choose low-profile RAM or carefully measure your components. - Case width required: At 162mm height and 138mm width (with fans), the cooler needs a case with at least 165mm of CPU cooler clearance. Some budget or ultra-compact cases won’t fit. Always check your case’s specifications before purchasing. - Installation process: While the mounting system is fairly straightforward, first-time builders may find it fiddly, especially on AM5 where the backplate alignment can be tricky. Official video guides are available on Thermalright’s YouTube channel. - Overkill for weaker CPUs: If your CPU is a Core i5 or Ryzen 5, a single-tower cooler like the Thermalright Assassin X 120 would be more cost-effective.

Compatibility Guide

  • Sockets: Intel LGA1851 / 1700 / 1200 / 115x; AMD AM4 / AM5 - Memory: Up to 40mm height clearance with factory fan position; taller memory may require fan relocation - Form factors: ATX, Micro-ATX (check case width); Mini-ITX possible only with wide cases - Power supply: CPU cooler draws negligible wattage; system PSU size matters - Notes: AMD backplate not included – use stock motherboard backplate

Product Disclosure (Amazon)

  • Manufacturer: THERMALRIGHT(サーマルライト)
  • Seller: Amazon US
  • Fulfilled by: Amazon US
  • ASIN: B0DQFYBSD6
  • Note: This article covers a manufacturer-made product based on Amazon listing details.