Ruth's sister 5 pcs 4-Pin fan speed reduction cable 11 cm 27 Ω 30%

Purpose-built silencing accessory

This five-pack of 4-pin fan speed reduction cables suits PC builders who want quieter cooling without replacing their existing fans. Each cable inserts between a motherboard or controller header and a standard large 4-pin fan to lower the voltage reaching the motor. The 11 cm length keeps cable routing tidy inside compact cases. Buyers who need PWM control retained or who use 3-pin fans should look elsewhere.

Resistance value that sets the speed drop

A fixed 27 ohm resistor in each cable cuts roughly 30 percent of the fan’s rotational speed compared with a direct connection. This single figure determines whether the airflow reduction matches your thermal budget. No variable resistor or switch is present, so the reduction is constant. Builders who require finer speed steps or full-speed operation under load cannot adjust these cables.

Bundled quantity enables multi-fan setups

Five identical cables in one pack let you silence several chassis or radiator fans at once, avoiding the cost of a dedicated fan controller. The male-to-female large 4-pin connectors require no tools or software configuration. Users with fewer than five 4-pin fans will have unused cables, while systems using 3-pin or proprietary connectors gain no benefit.