10/22/2023 0 Comments Download free 4 pin fan pinout![]() PWM stands for pulse width modulation, a technique that changes the duty cycle of a periodic digital pulse. To understand the reason for its existence, it’ll be best to revisit what PWM is all about. What Is a 4-Pin PWM Header?Ī 4-pin PWM header connects to a PC fan’s connector. In this article, we will uncover the benefits of the 4-pin PWM header and discuss what you need to design a fan controller. ![]() The 4-pin PWM header is unfamiliar to some, but its advantages make it worth knowing about. If you have ever wondered what a 4-pin PWM header is doing on a motherboard, you are not alone. Some cooling fans are driven by 4-pin PWMs. To maintain positive pressure, you need to have a higher combined CFM for the intake fans than the exhaust fans.Learn the basics of what a 4-pin PWM header is.įind out what you need to design a 4-pin PWM fan controller. When adding fans to a system, maintaining positive pressure within the case can prevent dust from being sucked into any open holes or crevices. Some manufacturers incorporate LED lighting into their fans as well. Larger fans can usually spin at lower speeds and still move plenty of air without making much noise. Some fans even come with built-in LED lights, others are more performance focused such as this Noctua Chromax fan. Thiago Trevisan/IDGįans vary in size, speed, blade shape and color. This information will be on the package or on the product’s information page. Look for one with a high air flow (measured in cubic feet per minute, or CFM) and low noise level (measured in decibels, or dBA). Fans with a diameter of 120mm are typical in newer cases. The most common fan sizes fall in the 70mm to 140mm range, but fans as large as 230mm are becoming more popular.
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