Question Fan Settings For Gigabyte Z390?

AfxTwn

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Dec 28, 2012
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Hi, I have just built a new computer using the Gigabyte Z390 Aorus Pro Wifi motherboard, an Intel i7 9700K CPU (overclocked to 4.8 GHz), 2 x 8GB Crucial Ballistix Sport LT 3000 MHz ram and a RTX 2070 Super GPU.
I am using a Fractal Design Meshify C case and a Noctua NH-U12A CPU cooler. I have switched out the fans that came with the case and instead have attached some extra fans.
I have 2 x Noctua NF-A14 PWM fans in the front as intake, 2 x NF-A14 fans in the top/roof as exhaust/intake and 1 x NF-A12x25 PWM fan in the rear as an exhaust.
I have gone into the Smart Fan 5 settings in my bios (I am on version F12c) and checked what settings the fans are using. Please could someone advise me what the best settings would be to use and in particular what to set the Fan Speed Control to (all fans and CPU cooler are set to Normal at the moment) and what Temperature Input each fan should use. I have read that it's best to set the fans to use the VRM MOS sensor but I don't know if that's right.
At the moment they are set as follows (the fans are just connected to whichever header was nearest or or easiest to connect to):
CPU fan is set to use the CPU temperature input (which is fine so I will leave that).
System 1 fan (which is my rear exhaust fan) is set to use System 1 temperature input.
System Fan 2 (which is my roof exhaust fan at the back nearest to the CPU) is set to System 1 temperature input.
System Fan 3 (which is my front intake fan at the bottom of the case and pointing towards the GPU) is set to System 1 temperature input.
System Fan 4 (unoccupied).
System Fan 5 Pump (which is my roof intake fan at the front just above the ram) is set to CPU temperature input.
System Fan 6 Pump (which is my front intake fan at the top pointing towards the CPU) is set to CPU temperature input.
All of the fans are set to PWM control mode.
I am not bothered about having a specific curve as I just want the fans to ramp up and down depending on what's best for the system so I am happy to leave them set to auto as noise isn't an issue. Oh and I have also read it's best to use the bios for fan settings rather than the SIV but I don't know if that's true or not. If the SIV is fine to use then I can just use that as it's easiest done from within Windows anyway.
Sorry for this long post and thanks for any help people can give.
 
2 x NF-A14 fans in the top/roof as exhaust/intake
You should have the top fans set to exhaust only. Meaning you should have front fans as intake and the rear+top fans as exhaust.

Considering that all fans are PWM, why don't you just set the fan settings to mimic/monitor/move with respect to the CPU temps...? That way the fans will all ramp up and die down as necessary when the CPU temps rise. You can then set a custom fan curve in BIOS if you think that the fans are making noise. Mind you, the fans you have should be very quiet so at full blast they shouldn't harm the ears.
 
2 x NF-A14 fans in the top/roof as exhaust/intake
You should have the top fans set to exhaust only. Meaning you should have front fans as intake and the rear+top fans as exhaust.

Considering that all fans are PWM, why don't you just set the fan settings to mimic/monitor/move with respect to the CPU temps...? That way the fans will all ramp up and die down as necessary when the CPU temps rise. You can then set a custom fan curve in BIOS if you think that the fans are making noise. Mind you, the fans you have should be very quiet so at full blast they shouldn't harm the ears.

OK, I was told by someone else that I have too many exhaust fans and this will cause negative pressure which is why I changed one of the roof fans to intake but it's not a problem to change it back again.

I had set the fans to follow the VRM MOS sensor as I had read elsewhere that was best for case fans. To be honest my CPU temperature hardly goes beyond 50 celcius, whereas my GPU only reaches around 70 celcius.

I was considering setting my bottom front intake fan to follow the PCIE temperature sensor so it will ramp up with the GPU and help to cool it but I don't know if that's necessary.
 

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