Meshify C Fan Placement Advice Please

[VenisonSneers]

Hi, I have just built my new PC and have bought a bunch of fans and would like some advice about where to place them, whether to use all of them and whether to have intakes or exhausts in the roof.

I have a Gigabyte Z390 Aorus Pro Wifi motherboard with an Intel i7 9700K and Noctua NH-U12A cooler in vertical position so that one fan on the right intakes air from the front, passes it through the heat sink and then back out through the other fan on the left.

I have a rear Noctua NF-A12x25 fan as an exhaust so that will also be getting air from the NH-U12A and expelling it out the back. In the roof I have two Noctua NF-A14 fans, the one at the rear just above the CPU cooler I have set to exhaust and the one at the front is set to intake but I don't know whether to set it to exhaust or remove it altogether.

Finally I have two more NF-A14 fans at the front of the case set as intake fans. The top front intake fan is in alignment with my CPU cooler and the bottom fan is more in alignment with my GPU which is a Gigabyte RTX 2070 Super Windforce OC 3x 8G.

In the bios (I have updated to version F12c), I have set all the fans to PWM control and the case fans are using the VRM temperature sensor but I don't know if it's better to set different fans to use different sensors depending on where they are in the case. For example, should I set the bottom front intake fan to use the PCIEX16 sensor so it can help to cool the GPU? Could any of the fans be set to use the System 1 or 2 sensors or even the PCH sensor?

I am not too bothered about noise, more just cooling so I was going to leave the fans set to auto so they ramp up and down when needed. Also the Windows power plan is set to balanced, would I be better setting it to high?

Thanks for any help people can give.

 

[doyll]

Meshify C stock fans are almost worthless at any speed other than full 1200rpm, and even then their pressure rating is only 0.88mmH2O. Good case fans have pressure ratings of about 1.3-1.5mmH2) at same speed. works best with 2x 140mm or 3x 120mm good pressure rated fans. NF-A12x25 is very good, but it's wasted as exhaust fans.

I would first remove all PCIe back slot covers to increase rear vent area around GPU (I know they are vented, but open slot will flow 2-3 times more air). Keep the 2x NF-A14 in front and block off (can use tape) any holes in fan mounting panel not covered by fans. This will make air flow through case instead of leaking back in front of them and going in circles. Put NF-A12x25 in bottom as intake to flow air up through PSU shroud to GPU. Have these intakes speed controlled based on CPU and/or GPU heat so they cycle and supply more air into case than CPU and/or GPU are using. the smoother the air flow through case means less turbulence which means less mixing of cool air with heated air and lower temp air entering coolers. With this setup there is no need for exhaust fans.

Below link is to basic guide to how airflow works and how to optimize case airflow:
https://forums.overclockers.co.uk/t...-i-put-my-temp-sensor.18564223/#post-26159770