Question Meshify c + noctua nh-d15s fan setup

May 9, 2020
Hi there. I have built a new workstation with an i9-9900k processor. Currently, when I am using 100% of my proc. power (parallel computing) I take about 73C that is quite good as I have read on the internet. Because in my country the coming months will be quite hot I am trying to reduce the temps as possible. So let me tell you my current fan setup.

Front: X2 GP-12 120 mm (meshify c preinstalled) + Noctua NF-P12 redux-1700 + an ordinary 120mm at 1200rpm. (all intakes)

Rear: the second X2 GP-12 120 mm preinstalled as exhausted.

and the one fan of Noctua NH-d15s pointing out of the case at the back.

Now I have ordered one Noctua NF-A14 industrialPPC-3000 and I have in my mind two possible setups for my fans.

Front: Noctua NF-P12 redux-1700 + NF-A14 industrialPPC-3000

Rear: X2 GP-12 120mm exhaust

Top: the ordinary 120mm 1200rpm as exhaust

and 1) the second X2 GP-12 120mm mounted on the CPU cooler.

2) the second X2 GP-12 120mm on the bottom as an intake

I would be glad for any suggestions!
At 75c. you are doing very well.
Even if ambient were to go up by 10c. you would still be ok.

I like the setup as you have it now.
But, if you are going for the best possible, I might suggest two of the noctua 140mm 3000 rpm fans in front. Since that would be the only intake source, your parts will stay cleaner.
You can always slow down a fan for less noise if you need to,
140mm fans move a lot of air relatively quietly.

A rear 120mm exhaust is really all you need. It is there, mostly to direct airflow past the cooler.
I would not install any fans in the top at all.
Whatever air comes in the front will exit somewhere, taking heat with it.
If you add exhaust fans at the top, they will tend to draw in unfiltered air.

The same argument applies to bottom intakes.
Think of cooling this way.
A single 140mm intake will be an approximate match to the 140mm NH-D15s fan.
The other 140mm intake will supply more air than most any graphics cooling fan setup.

Tests I have seen show only marginal improvement to adding a second fan to the NH-D15s,
Since you will have an extra 120mm, you could try it and see how you do.
May 9, 2020
Thanks for the answer mate, yesterday I tested and installed the ordinary 120mm as exhausted at the top just above the CPU cooler and I had 6-7C higher than previously so I moved it again at the front. So I will follow your advice!