PC Peripherals Cabinet fan speed adjustment

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Vinny

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Hello gang,
Got my Scythe 1900 rpm fan finally . But it's a little too loud for my comfort. Searched for fan control methods, but mostly found undervolting and other mods. Is there any software which could reduce the fan speed? My mobo (see sign) does not display the cabinet fan speeds, only the CPU fan. Neither does Speedfan recognize them. Any advice is much appreciated. If this topic was discussed earlier, please direct me to the same.

TIA
V
 
I'm pretty sure your motherboard supports undervolting of the fans connected to the fan headers on the board going by the model and the socket type. Did you browse through the several BIOS options?
 
Don't think my mobo has options for the cabinet fans. ASUS Smart Q-FAN can adjust only settings for the CPU fan.
Also will see if AMD overdrive detects the fans. Not sure about this, but will check as someone suggested on an older thread.
 
Checked the bios, it has options only to adjust the CPU fan. Also neither Speedfan nor AMD Overdrive detect the fans. I use a headphone, so its okay while gaming/watching movies. Problem is I can't leave it on at night to download . It's too loud lol.
 
I have the same motherboard and am also bugged by this issue.

It can control the CPU Fan (PWM) and the Chasis Fan (Voltage Control). The fan connected to PWR_FAN connector will spin at full speed. Dont know the exact reason though.

Somebody has posted about this problem in vip.asus.com and he got the answer that the fan connected to PWR_FAN connector cannot be controlled.

Bobby
 
Yes the ASUS boards do not support fan control through BIOS. In my case even Speedfan didnt work.

I just can't stand the noise in my PC and want my machine to be dead silent.

I solved this problem by under-volting the fan to 5V. My Xigmateks now run without any noise and with highly reduced glare. Just perfect for my use.

You need to take out the pins out of your molex connector and adjust them so that the fans now run on Red and black (by default they will use the yellow and black)

FYI: Yellow = 12V, Black = ground, Red =5V.

If the speed at 5V is less, you can use the red and yellow together (12-5=7V).

The only gripe is, if you want to make them run fast again, you got to change the pin configuration again. I don't need them any faster so I am all good.
 
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Would undervolting damage the fan? Any other risk associated with the same? The fan by itself isn't expensive, but the other components nearby are expensive.
 
Vasishta.Sushant said:
You need to take out the pins out of your molex connector and adjust them so that the fans now run on Red and black (by default they will use the yellow and black)

FYI: Yellow = 12V, Black = ground, Red =5V.

If the speed at 5V is less, you can use the red and yellow together (12-5=7V).
The only gripe is, if you want to make them run fast again, you got to change the pin configuration again. I don't need them any faster so I am all good.
Click to expand...

Nice information. Rep added :hap2:
 
Vinny said:
Would undervolting damage the fan? Any other risk associated with the same? The fan by itself isn't expensive, but the other components nearby are expensive.
Click to expand...

Nopes no problems (except reduced air flow :P).
 
Vasishta.Sushant said:
You need to take out the pins out of your molex connector and adjust them so that the fans now run on Red and black (by default they will use the yellow and black)

FYI: Yellow = 12V, Black = ground, Red =5V.

If the speed at 5V is less, you can use the red and yellow together (12-5=7V).
Click to expand...

An old trick but are you aware this will not work on many power supplies since the back voltage of 5V (12v-7v) will not let you power on the computer in some cases? This is more prominent when there are several fans and they are rated at a higher amperage.

I tried doing this on 3 Scythe Ultra Kazes 120mm fans with the HX620. The computer would not switch on when you press the power button. The fan on the power supply turns itself on for a blink of a second and keeps restarting.

Instead if you connect a resistive load to reduce the voltage from 12v to 7v, that's fine. I'm not sure what ohms must be the resistor though.
 
Desecrator said:
An old trick but are you aware this will not work on many power supplies since the back voltage of 5V (12v-7v) will not let you power on the computer in some cases? This is more prominent when there are several fans and they are rated at a higher amperage.

I tried doing this on 3 Scythe Ultra Kazes 120mm fans with the HX620. The computer would not switch on when you press the power button. The fan on the power supply turns itself on for a blink of a second and keeps restarting.

Instead if you connect a resistive load to reduce the voltage from 12v to 7v, that's fine. I'm not sure what ohms must be the resistor though.
Click to expand...

Never got that problem with my VX450. I have two Xigmateks 120mm and one stock 140mm fan, all running fine.

The fans wont work if you connect the terminals in the wrong direction. But why system won't work is little strange.
 
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