The best way to adjust your PC’s fan speeds is through the Unified Extensible Firmware Interface (UEFI). That being said, you can adjust PWM to run in DC mode, but it’s not recommended and is a downgrade in most cases. The extra pin in PWM fans makes them more power-efficient, giving the fan better performance. DC fans have a three-pin connector instead of a four-pin. Image via AmazonĭC fans are almost identical to PWM fans with one exception. To spot a PWM fan, look for a connector that is small, four-pinned, rectangular in shape, and plugs directly into the motherboard. On the other hand, you can manually adjust the two remaining fan types, which are DC and PWM. Unfortunately, because these fans bypass the motherboard, Molex fans are impossible to adjust manually.
Molex fans are characterized by their flat four-pin connectors and their direct connection to the power supply. There are three types of fans: Molex, DC, and PWM. The easiest way to identify a fan is to check the connector. CPU fans will always be adjustable, but other fans in your PC may not be so flexible. Fan typesīefore making any adjustments, you’ll need to check what type of fans you have.
This guide covers how to manually adjust your CPU fan as well as any other case fans. Manually adjusting your fan speed is also an essential step in overclocking a CPU. Luckily, you can adjust your fan speeds manually using a few different methods. This is often due to the automatic fan controller not functioning correctly. One of the main reasons a PC overheats is internal fans not operating at required speeds.
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