Cool the interior of your PC with the Noctua NF-A14x25r G2 PWM Black - Duo Fan Kit. These 2 fans of 140mm have a circular and rimless design. This way, they fit on a radiator better. These fans have a rotation speed of 1250 to 1500RPM. This keeps your components 10°C to 13°C cooler. This prevents overheating and quickly removes warm air from your PC. Thanks to PWM control, the fans run less intensely during light tasks. This reduces your energy consumption, making your PC more energy efficient. With a 24.6dB maximum noise level, the fans remain reasonably silent. This means you won't be bothered by noise while gaming or performing other demanding tasks. You can use these Noctua fans for supplying cool air as well as extracting hot air. You also get a 6-year warranty from Noctua.