Fan Controllers and Bay Panels

What a 5.25-inch controller panel does

A fan controller panel fits a front 5.25-inch drive bay and puts knobs or sliders within reach, so you can set fan speeds without opening the case. Examples here control three fans at 12 V and draw their power from the supply. Simple panels lower the voltage, so they suit 3-pin and 4-pin fans, but they ignore the PWM signal of 4-pin fans. Check the per-channel current rating before adding fans, and remember that the case must still have a free 5.25-inch bay.

Front I/O panels and mobile racks are model-specific

Not every panel here controls fans. Front I/O panels and their cables are replacement parts for particular desktop models, so match the exact system and part number in the title. Dual-bay mobile rack panels let two drives slide in and out of a 5.25-inch bay, so check the drive size and interface they accept. Some listings are complete small computers or gaming accessories, which do not belong in this category, so look for the words panel, controller or bay in the title.

Questions about Fan Controllers and Bay Panels

Do I need a 5.25-inch bay for a fan controller?

For these panels, yes. They mount in a front 5.25-inch bay, which many modern cases no longer include. Without one, use motherboard fan headers with software control or a small hub inside the case.

Will a manual fan controller work with 4-pin PWM fans?

Usually, but it controls speed by lowering voltage and does not use the PWM signal. At very low settings some fans stall, so test the minimum speed and keep the connector orientation correct.

How many fans can one controller channel run?

Check the per-channel rating, often around 1 A or about 12 W. Adding a splitter sums the current of the fans, and going over the limit can overheat the controller, so add up the rated current of every fan on that channel.