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Hello everyone, in this lesson we will talk about the fan interface of the graphics card

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The fan interface of the graphics card is used to connect the cooling fan of the graphics card

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Graphics card fans generally only have 4 pins

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Its pin definition is shown on the right

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They are power supply, grounding, speed regulation and speed monitoring

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Among them, the speed adjustment and speed monitoring are generally controlled by the GPU

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The fan power supply is generally 12 volts

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If a fan only has power supply, without speed adjustment and speed monitoring,

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it will generally spin wildly

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Therefore, when the fan is changed to a longer rotation speed,

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you can directly pick out the speed adjustment line.

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Generally, some Internet cafe graphics cards will have this requirement.

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It should be noted that not all graphics cards can do this

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For some graphics cards, the fan will not turn directly after the speed adjustment cable is removed.