Scythe launches Kotetsu Mark 4 CPU cooler with upgraded Wonder Tornado fan

Scythe Japan has officially introduced the Kotetsu Mark 4 (model SCKTT-4000), the latest iteration of its popular entry-level air cooler. Designed to replace the Kotetsu Mark 3, this new model retains the signature single-tower form factor while integrating significant performance upgrades, most notably the transition to the new Wonder Tornado 120 mm PWM fan.

Brought to our attention by ITHome (via TechPowerUP), the new Kotetsu Mark 4 features four 6 mm nickel-plated heatpipes, maintaining the thermal transfer standards of its predecessor. Physically, the Mark 4 is slightly more compact than the Mark 3, measuring 134×155×80 mm compared to the previous 138×154×80 mm, and weighing 771 g, including the fan. The aesthetic has also been refined with a redesigned top cover that offers a cleaner, more premium look for system builders who value attention to detail.

The new fan choice is what drives the performance improvements. Replacing the Kaze Flex II used in the previous generation, the Wonder Tornado 120 mm fan operates between 350 (±200) RPM and 2000 RPM. This configuration delivers a rated airflow of up to 60.29 CFM and a static pressure range of 0.05 to 2.45 mmH₂O. These specifications ensure the cooler is well-equipped to handle modern mainstream processors, even in space-constrained mid-tower cases, with noise levels ranging from 3.0 dBA to 28.88 dBA.

Scythe has ensured broad compatibility for the new unit, supporting AMD's AM4 and AM5 platforms as well as Intel's LGA 1851, 1700, 1200, and 115X sockets. The cooler is currently priced at ¥3,480 (approximately £17) in Japan.

KitGuru says: Although it won't top any performance charts, the Kotetsu Mark 4 could be a solution worth considering for someone building an entry-level system that wants something more than your typical stock cooler.

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