Thermalright today introduced the Peerless Assassin 120 MINI series of medium-sized dual fin-stack CPU coolers, which come in two trims—all black and all white. As its name suggests, this is a compacted variant of the Peerless Assassin 120 cooler from 2021. Its design involves not just a smaller heatsink, but also a single fan configuration, with a single 120 mm fan located between the two fin-stacks, pulling air from one of the stacks, and pushing it through the next. With its fan in place, the Peerless Assassin 120 MINI measures 125 mm x 110 mm x 145 mm (WxDxH), with 135 mm height without the fan. For comparison, original Peerless Assassin 120 measures 125 mm x 135 mm x 157 mm, and has a dual 120 mm push-pull fan setup. Including the fan, the Peerless Assassin 120 MINI weighs 820 g.

The design of the Peerless Assassin 120 MINI involves a nickel plated C1100 copper base, through which six 6 mm-thick copper heatpipes pass, with the two aluminium fin-stacks along their two ends. The included Thermalright TL-D12B fan features a fluid dynamic bearing, turns at speeds of up to 1,500 RPM, pushing up to 66.87 CFM of airflow, at 1.53 mm H₂O static pressure, and 25.6 dBA maximum noise. Among the CPU socket types supported by the cooler are LGA1700, AM5, AM4, and LGA1200. The company didn't reveal pricing.