This article covers 【限定】Thermaltake MAGFloe 420 Ultra Black All-In-One Liquid Cooler System オールインワン 420mm 水冷CPUクーラー CL-W451-PL14SW-A FN2475.

Overview

Thermaltake's MAGFloe 420 Ultra Black is a massive 420mm all-in-one liquid CPU cooler that goes beyond mere cooling. The standout feature is the 3.95-inch square LCD display on the pump head, offering 480x480 pixel resolution for real-time temperature monitoring, GIF animations, and even video playback. Bundled with three SWAFAN EX 140mm fans that have reversible blades, you can swap the fan blades to flip airflow direction without flipping the whole fan frame — a clever trick for optimizing case airflow.
Cooling performance is backed by a 27mm thick radiator with high-density fins and a copper cold plate that efficiently transfers heat. The fans spin up to 2000 RPM, delivering up to 81.6 CFM (standard blades) or 79.3 CFM (reverse blades) with respectable static pressure. MagForce 2.0 magnetic connectors allow daisy-chaining up to five fans with a single cable run, keeping your build tidy. The pump itself draws 5.16W and uses a standard 4-pin PWM header for speed control.
This is undeniably a high-end product aimed at enthusiasts who want top-tier cooling, eye-catching visuals, and flexible fan orientation. It competes directly with other 420mm AIOs like the Corsair H170i Elite or Arctic Liquid Freezer III 420, but the unique reversible blades and large LCD give it a distinct identity.

Compatibility Guide

Socket compatibility is broad: Intel LGA 2066/2011-3/2011/1851/1700/1200/1156/1155/1151/1150 and AMD AM5/AM4/AM3+/AM3/AM2+/AM2/FM2/FM1. The kit includes mounting hardware for all of these out of the box. Notably, LGA1851 (Core Ultra 200 series) and AM5 are fully supported — no extra adapters needed.
Physical fit is the bigger concern. The radiator measures 456 x 139 x 27 mm, so you need a case that can accommodate a 420mm radiator (usually at the top or front). Many mid-tower cases only support up to 360mm, leaving no room. Double-check your case specs before buying. Tube length is 460mm, which should be plenty for most full-tower and super-tower cases.
Power connectors: fans use 4-pin PWM, ARGB uses a standard 3-pin 5V header, and the pump requires a USB 9-pin header for LCD control. Make sure your motherboard has enough headers — especially the USB 2.0 header, which is sometimes shared with other devices.

Product Info

The MAGFloe 420 Ultra Black launched in the second half of 2025 as online retailers exclusive. Retail price sits around ¥36,344, backed by a 2-year warranty through the official Japanese distributor.
Market positioning: high-end enthusiast. It combines serious cooling capability with extensive customization options — the LCD panel, reversible blades, and magnetic daisy-chaining are features you won't find on most AIOs. While 420mm radiators are overkill for mid-range CPUs, they provide ample headroom for overclocked Core i9 or Ryzen 9 processors.

Best Use Cases

  • High-end gaming or workstation builds: If you run an i9-13900K, 14900K, or Ryzen 9 7950X and plan to push them hard, the extra surface area of a 420mm radiator means lower fan speeds and quieter operation under load compared to a 360mm unit. Not recommended for budget builds with i5/Ryzen 5 — you won't see benefit.
  • PC show builds with windowed cases: The large LCD panel can display system stats, logos, or custom animations, and the RGB fans (addressable via TT RGB Plus 2.0) add plenty of flair. If aesthetics matter, this cooler delivers. But if your case has no window, the LCD's visual appeal is wasted.
  • Builders who value cable management: MagForce 2.0 lets you connect up to five fans with just one cable run, dramatically reducing clutter. If you hate wrestling with multiple fan cables, this is a huge plus. On the flip side, the magnetic connectors are proprietary — if you lose or break a cable, you can't substitute a generic PWM splitter.

Things to Consider

First and foremost: case compatibility. A 420mm radiator is large and will not fit in most mid-tower cases. You need a case specifically designed for 420mm support (e.g., Fractal Meshify 2 XL, Lian Li Lancool III, Corsair 7000D). Measure clearances carefully — especially if mounting at the top, where motherboard VRM heatsinks or tall memory modules could interfere.
Second, this cooler is likely overkill for mainstream CPUs. For a Ryzen 5 or Core i5, a $100 240mm or 360mm AIO will suffice. Spending nearly ¥36k on a cooler for a mid-range chip is hard to justify unless you value the LCD and aesthetics independently.
Third, noise. At maximum fan speed (2000 RPM) the fans produce up to 38.8 dBA (reverse blades). That's not silent. While you can run them lower via PWM, if absolute quiet is your goal, consider a larger air cooler or a custom loop with thicker radiators.
Competitors worth comparing include the Corsair iCUE H170i Elite LCD (also 420mm, 2.1-inch LCD) and Arctic Liquid Freezer III 420 (no LCD, but often c

Product Disclosure (Amazon)

  • Manufacturer: Thermaltake
  • Seller: Amazon.co.jp
  • Fulfilled by: Amazon.co.jp
  • ASIN: B0FCS2XXFW
  • Note: This article covers a manufacturer-made product based on Amazon listing details.