Question Cheap fan set up ?

[BuZey]

Hi! I was given a very cheap case carrying 3 (2 front, 1 back) interconnected fans with colorful led lights. They have both molex and 3pin connections. They change colors if I connect reset switch cable to one of the fan headers. I was told that each draws 0.3A. My A520 board has one 12V sys fan header, 1 12V JRGB (RGB) and 1 5V JRAINBOW (ARGB) headers, all 4-pin.

I have connected them to PSU via molex which caused a non-stop maximum RPM (11000) mayhem accompanied with unbearable noise. Then removed the PSU connection and connected one of the 3-pins to system fan connection on the motherboard which in turn enabled DC setting on the BIOS. I set the voltage up through BIOS which turned off the leds and reduced the revolution of the two. It naturally brightens the lights when more cooling is needed. The noise is reduced but still loud.

I was under the impression that it might have displayed the average of the three but instead it shows 3 consecutive readings of system fan, 2 of them around 800-900 RPM and 1 around 10,000. I have a basic APU, Ryzen 5600G with no extra GPU, and rarely play games so I don't need this much cooling.

I can not purchase a fan or some sort of adapter/cable for the moment so I am asking for help about two things, both to reduce the noise and energy consumption:
1. How can I slow down all three or get the correct readings?
2. How can I remove and get rid of one of the front fans? Molex is easy as they are female/male plugs, but 3-pins seem to be connected inside the connectors.
Thanks.

 

[JohnBonhamsGhost]

How can I remove and get rid of one of the front fans?

disconnect cables,
unscrew the fan at each corner,
remove

 

[BuZey]

disconnect cables,
unscrew the fan at each corner,
remove

Thanks. But "3 pins seem to be connected inside the connectors". I considered cutting but if I cut one the rest wouldn't work unless it's the rear fan.

 

[JohnBonhamsGhost]

3 pins seem to be connected inside the connectors

i don't understand what you are describing.

fans can sometimes be daisy-chained together to share a connection but i've never seen fans that are actually manufactured as a solid cable with multiple devices sharing this single cable.

unless these are some very generic odd design, you should be able to pull all three fans apart where their 3 / 4 pin input connectors meet.
if not, your only option is to purchase some decent models that will install correctly; 4pin PWM(+ 3pin aRGB if necessary).

 

[BuZey]

i don't understand what you are describing.

fans can sometimes be daisy-chained together to share a connection but i've never seen fans that are actually manufactured as a solid cable with multiple devices sharing this single cable.

unless these are some very generic odd design, you should be able to pull all three fans apart where their 3 / 4 pin input connectors meet.
if not, your only option is to purchase some decent models that will install correctly; 4pin PWM(+ 3pin aRGB if necessary).

You couldn't understand because of my ignorance. Thanks for your patience. I removed one of them.

Mistaken RPM readings continue and I've noticed that the noisy fan is the CPU fan.

 

[JohnBonhamsGhost]

Mistaken RPM readings continue

some lower quality fans just have issue broadcasting their signals
and some lower quality motherboards just have issue reading the signals.

if the motherboard manufacturer's control software inside of Windows doesn't give good control over the installed fans,
i would try installing some 3rd party software like SpeedFan and see if it gives you more specified speed control over the connected fans.

if they are 3pin and set to "DC" mode you should still be able to control the percentage of power they receive even if not an actual RPM target.

the noisy fan is the CPU fan

this will probably need to be replaced.
i would be aiming for a higher quality CPU cooler that comes with it's own higher quality fans.

 

[BuZey]

some lower quality fans just have issue broadcasting their signals
and some lower quality motherboards just have issue reading the signals.

if the motherboard manufacturer's control software inside of Windows doesn't give good control over the installed fans,
i would try installing some 3rd party software like SpeedFan and see if it gives you more specified speed control over the connected fans.

if they are 3pin and set to "DC" mode you should still be able to control the percentage of power they receive even if not an actual RPM target.

this will probably need to be replaced.
i would be aiming for a higher quality CPU cooler that comes with it's own higher quality fans.

I wouldn't say MSI motherboard is low quality, it should be the fans. As I mentioned in my first post they're already set to DC mode...and there is a 'smart fan' option for 'DC', too. Thanks for your help.

 

[BuZey]

some lower quality fans just have issue broadcasting their signals
and some lower quality motherboards just have issue reading the signals.

if the motherboard manufacturer's control software inside of Windows doesn't give good control over the installed fans,
i would try installing some 3rd party software like SpeedFan and see if it gives you more specified speed control over the connected fans.

if they are 3pin and set to "DC" mode you should still be able to control the percentage of power they receive even if not an actual RPM target.

this will probably need to be replaced.
i would be aiming for a higher quality CPU cooler that comes with it's own higher quality fans.

Nah, the culprit is the continuous PSU fan that came with the cheap case. Stock Ryzen fan is capable and silent. Is there anything basic that I can do to lower its noise? I don't have any budget to spend.

 

[JohnBonhamsGhost]

the culprit is the continuous PSU fan that came with the cheap case. Stock Ryzen fan is capable and silent

then why did you state that,

the noisy fan is the CPU fan

?

it is starting to sound like you really don't know what's going on.

but, i would never suggest using any generic unknown power supply.
you are risking everything connected each time you power on.

 

[BuZey]

I have a flared arthritis and can't move much when I don't have help. Whatever I do I do it remotely and via wireless keyboard and mouse. Today the case was placed within my slght and I can see the cpu fan and sys fans slow down or speed up with no effect on the unbearable noise. The psu fan seems to be facing the floor and turns non-stop.
Well, the case is a very well-intended gift when I needed it most. Cheap can be very ezpensive, can't it?