The boxed processor fan heatsink uses a variable speed fan that increases in speed as the air temperature entering the fan increases.

盒装处理器的风扇散热器采用了一种变速风扇，它可以随着进入风扇的空气温度的升高而提高转速。

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What is the 4th wire for on the processor fan?

什么是处理器风扇的第4线？

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The processor fan operates at a low speed while internal chassis temperatures are low.

当机箱内部温度低时，处理器风扇低速运行。

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His recently completed Project Inverted, just highlighted by ASUS, puts most of the hardware on the outside: the Sabertooth Z77 motherboard, Core i5 processor, fan cooling, memory, Radeon HD 6870 video card and watercooling pipes all sit in plain sight.

ENGADGET: Project Inverted turns a gaming PC inside-out with hand-made casing

The processor then hung too close to the fan, its heat causing a sensor to go off which automatically shut down the server.

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To maintain its sleek physique, Intel pairs the desktop-class Core processor at the heart with a laptop-style heatsink and fan.

ENGADGET: Intel's Thin Mini-ITX platform gets stuffed inside a monitor