Need some help with fan config in my Enthoo lux

[enigma27]

Morning All.

So built my new system yesterday but wanted some advise on my fan set-up and whats the best way to handle it.

So currently i have the following custom loop.

360 Rad, GPU, CPU, Pump/res all in the loop. Attached to the Radiator I have 3 Vadar fans pulling air up through the rad. I also have one 3 pin AF120 on the back pulling out and 2 AF 120 on the front pulling in.

So my question is around how to control these fans... So i have a Luxe case with a PWM hub and have the fans set-up as follows.

PWM hub --> CPU fan header
AF 120 in socket 1 of the hub (this is the fan the hub uses to sync voltages withe the other fans)
Socket 2 & 3 AF 120 at the front
The 3 vadar fans are connected to a PWM 3 way splitter that then plugs into the PWM hub. This is all controlled via the motherboard software.

The fan hub is powered by a Sata connection

Now here is where the problem lies.. Last night i popped the top filter off and realized that only two of the three rad fans were spinning at idle... the AF 120 are all spinning... this got me thinking may the PWM fans don't like being controlled by voltage..

So trying to work out whats best..

The mobo has 5 sys fan headers but according to the manual only the CPU header is PWM the rest are voltage controlled.

Would the cpu header be enough to run three pwm fans?

I am thinking ditch the PWM hub altogether and simply plug the 3 way pwm splitter into the CPU header and run the PWM fans from that and then use the system fan headers to run the 3 AF 120 non pwm fans (each on its own header)

Anyone got any advise would be helpful.

 

[enigma27]

just to add the reason I am trying to sort this is that my GPU with full cover block idles at 37 which i thought was quite high for a water cooled GPU but then when i released that only one rad fan was spinning it made me thing that maybe heat was not being ejected out quick enough to cool the GPU right down..

A quick test of heaven and GPU never exceeds 60 degrees.

 

[enigma27]

Ok had a long hard think and I may have solved it..

So i am going to bypass the PWM controller on the case completely..

I have picked up a PWM controller that has 5 connections plus Sata power which i will run from the CPU header and then plug the three AF fans into the Sys fan connections... i should then be able to control the Rad fans and case fans seperate

 

[enigma27]

All sorted.

Changed the rad fans to push and put them on their own pwm and the other three fans on the mobo sys connectors.. GPU is idling at 31 and cpu at 29

Heaven benchmark showing GPU now not going over 50

I can change the rear from an out to an intake but temps are fine now so not sure if it will help anymore