標題: 風扇接口問題 3 pin to 4 pin header speed control [打印本頁]

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作者: starshipper1    時間: 2015-10-6 11:25     標題: 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 ??



圖片附件: ccccccc.jpg (2015-10-6 11:26, 52.16 KB) / 下載次數 191
https://www.hkepc.com/forum/attachment.php?aid=1831923&k=f03e05b7f3b5df7e2c2994835468afd4&t=1794194276&sid=A4hv4Sv3h6

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作者: chanmingfu    時間: 2015-10-6 12:33

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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作者: starshipper1    時間: 2015-10-6 12:43

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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作者: chanmingfu    時間: 2015-10-6 13:18

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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作者: 柏斯    時間: 2015-10-6 13:45

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作者: starshipper1    時間: 2015-10-6 14:39

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

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作者: starshipper1    時間: 2015-10-6 14:44

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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作者: 唐賓南紀念中學    時間: 2015-10-6 15:25

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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作者: starshipper1    時間: 2015-10-6 16:58

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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作者: 柏斯    時間: 2015-10-6 17:06



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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作者: starshipper1    時間: 2015-10-6 17:32

Yes thats what I thoughy and read from other foreign forums, mentioning the lack of control on asrock 4 pin fan header for 3 pin
Thanks for clearing the doubt
(btw i will reply to you later via messages)

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作者: 柏斯    時間: 2015-10-6 17:41



其實全部係PWM control係好事
起碼加1-to-4 connector都仲可以control fan speed
我用緊D gigabyte板將non-cpu fan header轉做voltage control (pwm pin = 1, voltage pin = speed control)
就算買左D貴DD既PWM fan，結果都只會變返voltage control
又唔可以加1-to-4 connector下做speed control…比佢玩死

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作者: 林洋2    時間: 2015-10-6 20:40

買控速器都多餘,而家我全部轉哂做PWM風扇,底板有3組PWM插,加埋SPEEDFAN,想幾多轉就幾多轉


圖片附件: 1.JPG (2015-10-6 20:40, 85.91 KB) / 下載次數 138
https://www.hkepc.com/forum/attachment.php?aid=1832031&k=9f395d0750254c9202179865f9114ca4&t=1794194276&sid=A4hv4Sv3h6

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作者: starshipper1    時間: 2015-10-6 22:59

yes i used this before. Speedfan is a decent app to control speed fan yet the problem for me lies in the hardware configuration itself. That four pin header in asrock b85 killer might not allow speed control on my 3 pin case fan because it simply doesnt support voltage monitoring (instead they send pwm signal to the fan)

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作者: 柏斯    時間: 2015-10-7 15:29


樓主係有3pin fan而唔想浪費

via HKEPC Reader for Android

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作者: chanmingfu    時間: 2015-10-8 20:34

回覆 13# 林洋2


    what MB has that many PWM pins.

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作者: 林洋2    時間: 2015-10-9 07:44


msi z77 gd55,有5個風扇插頭,其中3個係PWM