風扇接口問題 3 pin to 4 pin header speed control

見上代cpu motherboard 不斷降價和skylake 和 ddr3 相容問題
想上i7 4790 和 asrock b85 killer (budget 所限) 後加3 case fans
asrock b85 killer 有6 個 fan headers :
- 2 x CPU 風扇連接埠 (1 x 4-pin, 1 x 3-pin)
- 3 x 機箱風扇連接埠 (1 x 4-pin, 2 x 3-pin)
- 1 x 電源風扇連接埠 (3-pin)
除電源風扇連接埠 不能control speed 外其他5個都 speed controllable
因已有3個 14cm 3 pin fan 想問問 3pin fan 入以下 4 pin header 仍可否control speed via voltage ??

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2015-10-6 11:26

no, since 3 pin fans does not have the 4th pin, which is the speed control. there for not  voltage controllable.
but there is a way to work around.
i would buy one of these when i get a new computer. that way  even 2 pin fan is voltage controllable.

https://s.taobao.com/search?q=4% ... &sort=sale-desc

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回覆 2# chanmingfu


  excellent!! thanks for your quick reply
may i ask which specific model or brand you use  for fan control?? there are too many of them >_<

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回覆 3# starshipper1


    i haven't got one yet. so you have to check them out to see which one suits you the best.

please note, they don't work for 4 pin PWM fan  (cpu fan) since the speed control is performed by inside the fan.   

if you don't need to know the fan speed/temperature, may be just need a basic one ~RMB30

remember, you need a 3 pin fan in order to display the fan speed.

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Thanks the basic one should suit me fine coz all my fans are 3 pins so far :)

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Any other issues I have to be aware of while using a fan controller ? Just simply connect it to the psu and case fans ?

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3pin同4pin風扇/頭可以互插
3pin用改電壓黎控制速度, 4pin用第4條線去叫個風扇自己改個速度
3pin風扇插落4pin主板一樣可以改到轉速, 但因為電壓低左, 早期的LED風扇上的光會比較暗. 但新LED風扇如wing12pl唔會有呢個問題
3pin同4pin扇可以話係一樣, 只係4pin多個pwm控制器所以貴D

我自己用nzxt 個sentry lx, 有測溫針可以因應溫度自動加速減速. 溫度同轉速配搭無得改, 唔完美, 但可以手動鎖死轉速
平日上網用手動較去最低溫, 打機就較去自動

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本帖最後由 starshipper1 於 2015-10-6 17:05 編輯

Is that really true for a four pin connector on the board to support 3 pin fan speed control ? Judging from the structure shown in the picture, It should be only for pwm only not voltage control as its not built to change fan voltage, right ?
Thanks for all the advice and please offer me some help again !!

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Is that really true for a four pin connector on the board to support 3 pin fan speed control ? It sh ...
starshipper1 發表於 6/10/2015 16:58


你check返睇主板manual
以你一樓個幅,就一定唔係voltage control,因為佢寫明pin2係+12v

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