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Slow down 3pin fan

carzacc
By carzacc
in Cooling
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I want to use as intake an old 3pin 92mm fan from a €10 Pentium 4 CPU Cooler that has never been used, since I ran out of fan headers on my mobo and my other fans are 4pin, there is a €2 3 pin to molex connector on amazon.it, but I'm worried that the fan will be way too loud at full speed, I have the low noise adapters from an NH-L12 but they probably won't work, since they're 4pin and AFAIK 4pin is PWM and 3pin is DC, so that's not what I'm looking for

APU: AMD A10-7850K cooled by an NH-L12; PSU(going to upgrade sooner or later):  Antec VP450P;RAM: 2x4GB HyperX Savage 2133MHz; MOBO: Asus A68HM-Plus; CASE: Itek [something] ; HDD: WD Blue 1TB(WD10EZEX)

OS: Triple boot openSUSE Leap Debian Jessie and Windows 10(aka MSX)

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I wonder, could you wire in a resistor to bring the voltage down (and therefore the speed)?

[FS][US] Corsair H115i 280mm AIO-AMD $60+shipping

 

 

System specs:
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1 minute ago, knightslugger said:

I wonder, could you wire in a resistor to bring the voltage down (and therefore the speed)?

Wouldn't a resistor bring the current down instead of the voltage?

APU: AMD A10-7850K cooled by an NH-L12; PSU(going to upgrade sooner or later):  Antec VP450P;RAM: 2x4GB HyperX Savage 2133MHz; MOBO: Asus A68HM-Plus; CASE: Itek [something] ; HDD: WD Blue 1TB(WD10EZEX)

OS: Triple boot openSUSE Leap Debian Jessie and Windows 10(aka MSX)

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just get a adaptor for that,idk 12v molex to 7v 3pin for example

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1 minute ago, carzacc said:

Wouldn't a resistor bring the current down instead of the voltage?

lots of ways you can use them.

[FS][US] Corsair H115i 280mm AIO-AMD $60+shipping

 

 

System specs:
Asus Prime X370 Pro - Custom EKWB CPU/GPU 2x360 1x240 soft loop - Ryzen 1700X - Corsair Vengeance RGB 2x16GB - Plextor 512 NVMe + 2TB SU800 - EVGA GTX1080ti - LianLi PC11 Dynamic
 

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Wouldn't plugging the molex connector upside down(forcing it will probably be fine with a cheap adapter like that) give the fan 5v instead of 12v and slow it down?

APU: AMD A10-7850K cooled by an NH-L12; PSU(going to upgrade sooner or later):  Antec VP450P;RAM: 2x4GB HyperX Savage 2133MHz; MOBO: Asus A68HM-Plus; CASE: Itek [something] ; HDD: WD Blue 1TB(WD10EZEX)

OS: Triple boot openSUSE Leap Debian Jessie and Windows 10(aka MSX)

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19 minutes ago, carzacc said:

Wouldn't plugging the molex connector upside down(forcing it will probably be fine with a cheap adapter like that) give the fan 5v instead of 12v and slow it down?

Well, it's a bit more elegant to swap the pins since the connector is keyed to fit one way but yes, that would slow the fan down. 

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13 minutes ago, WoodenMarker said:

Well, it's a bit more elegant to swap the pins since the connector is keyed to fit one way but yes, that would slow the fan down. 

It's functionally the same, thanks for the answer!

APU: AMD A10-7850K cooled by an NH-L12; PSU(going to upgrade sooner or later):  Antec VP450P;RAM: 2x4GB HyperX Savage 2133MHz; MOBO: Asus A68HM-Plus; CASE: Itek [something] ; HDD: WD Blue 1TB(WD10EZEX)

OS: Triple boot openSUSE Leap Debian Jessie and Windows 10(aka MSX)

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