Fan control question

Secretweapon

Weaksauce
Joined
Sep 24, 2004
Messages
116
I have a question on using the RPM / Fan control with ASUS Fan Xpert 4.

Current setup:

6 x Corsair LL Whites (Planned Radiator fans) - (2200rpm max)
4x EZ-DIY moonlight Whites (Case fans) - (1600rpm max)
All 10 fans are hooked up to a FH10 Deepcool 10 port Fan hub on CPU FAN header on ASUS DH.

As far as i know only fan 1 port is detected by MB and the Fan Xpert software (which is occupied a corsair fan) If I raise the fan speed to say 1800rpm, the corsair fans will all match. What I'm not sure on is how the EZ-DIY fans will react, will they just raise to that rpm(yikes?) Or a percentage of the 1600rpm max? I don't want to damage them with the higher rpm settings.

The EZ-DIY ARGB hub also has 5 PWM fan ports (Connected to one of the MB chassis fan ports) that I could just swap the 4 fans back to.
 

grim4593

Limp Gawd
Joined
Nov 30, 2014
Messages
306
The motherboard will send a PWM signal to the computer fans and they will run at the corresponding frequency. So if your motherboard is putting out 30% the Corsair fans and EZ-DIY will both be running at approximately 30% of their max RPM.
The fan curve is not necessarily linear so if you have a 2000 rpm fan and you run it at 25% it does not necessarily mean it will be spinning at 500 rpm, but it should be pretty close. An example of one of the fan curves from Fan Xpert 4 is below.
Since you are mixing two different fans that may have different stall speeds you will want to make sure that you don't set the lowest PWM/rpm speed to where the non-sensored fans do not spin since being stalled can cause them to overheat and damage them.
1614564301047.png
 

Nasgul

Weaksauce
Joined
Jun 11, 2005
Messages
107
Why don't you use fan splitter cables for those 4 EZ-DIY fans and connect them to a different fan header?

I don't like fan hubs, so I did fan splitters, all 3x 120mm RAD fans are connected in the CPU fan header, then the 3x 140mm intake fans connected to a fan header and any of the other fans are connected to the motherboard's fan header, and yes, with splitters when necessary.
The Fan Xpert works great, I can easily adjust any of the fan speeds and even turn them off, not necessarily being PWM either. I got 4 cheap $9.99 MetallicGear 140mm fans.
 

Secretweapon

Weaksauce
Joined
Sep 24, 2004
Messages
116
Thanks! They won't be going anywhere lowest speed until I get my WC loop in. Maybe I'll switch over then.

Fan splitter would mean potentially more cables in the front, I think 4 of these fans is getting dangerously close to the 1A header limit.
 

doyll

[H]ard|Gawd
Joined
Feb 4, 2012
Messages
1,356
I agree, 4x fans might be too much on single fan header. A fan rated 0.20A can and do draw 3-6 times that 0.6-1.2A) at startup or if something stops impeller from turning.
 
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