Question How to achieve positive air pressure and keep temps low?

[wizkid96]

Hello everyone,

I recently discovered undervolting for GPUs and have been extremely happy with the results I got, but this led me down a pretty deep rabbit hole of optimization. I’m not experienced at all, so this is why I’m writing here. I was trying to set custom curves on my fans to achieve positive pressure inside the case to minimize dust, as it collects quite easily where I am. Unfortunately, I’m not sure if I’m doing this right. I have 3x120mm fans on the front as intake, 1x120mm on the back as exhaust, and a Cooler Master 240mm Lite AIO on the top as exhaust. The fan on the side of the case is off since it never did much to help with cooling or airflow anyway.

I plan on buying a better fan for the back since this one is pretty cheap. Additionally, I am planning on getting a Deepcool LT720 360mm AIO since the temps on the Ryzen 5950x get a bit high under load.

This is a picture of the fan setup:

https://imgur.com/D2OuqIs

View: https://i.imgur.com/D2OuqIs.jpeg


This is a picture of relative idle temps in a room with an ambient temp of around 31°C:

https://imgur.com/k3eV00c

View: https://i.imgur.com/k3eV00c.jpeg


And these are the curves I’ve set in the BIOS for the fans and pump.

Front fans -

https://imgur.com/4Tfs6QC

View: https://i.imgur.com/4Tfs6QC.jpeg

Back fan -

https://imgur.com/js4QUAC

View: https://i.imgur.com/js4QUAC.jpeg

Pump -

https://imgur.com/w9mWbfS

View: https://i.imgur.com/w9mWbfS.jpeg

Radiator fans -https://i.imgur.com/3HUNDYb.jpeg

If anyone can tell me how to go about setting fans for the best airflow, I would greatly appreciate it.

These are my specs:

• Case: Corsair iCue 5000X RGB
• Motherboard: MSI MAG X570 TOMAHAWK WIFI
• Video Card: Palit GeForce RTX 3090 GamingPro 24 GB
• CPU: AMD Ryzen 9 5950x
• CPU Cooler: Cooler Master MasterLiquid Lite 240, 2x120 mm
• RAM: Corsair VENGEANCE RGB PRO DDR4 32 GB (2x16 GB) 3600 MHz
• Power Supply: Cooler Master MWE 850 Gold V2

 

[SkyNetRising]

How to achieve positive air pressure and keep temps low?

Put radiator in side position. Radiator fans oriented as intake.

 

[wizkid96]

Put radiator in side position. Radiator fans oriented as intake.

Wouldn’t this put more hot air into the system ?

 

[SkyNetRising]

Wouldn’t this put more hot air into the system ?

Yes. Slightly.
But cpu temperatures would be lower and you get positive air pressure.

 

[JohnBonhamsGhost]

plan on buying a better fan for the back since this one is pretty cheap

i would change all fans to higher quality.

a Cooler Master 240mm Lite AIO on the top as exhaust...planning on getting a Deepcool LT720 360mm

this should make quite a difference for you.
even moving from a 280mm to a 360mm with similar quality fans lowered CPU temperatures ~6° across the board for me.

whether the AIO should be mounted on the side as intake or top as exhaust really depends on the overall setup.
i would install the 360mm in the top as exhaust and add 3x more side fans as intake.
this way fan RPMs can be significantly lowered to cut quite a bit of noise and offer much better temperatures system-wide.

 

[wizkid96]

i would change all fans to higher quality.


this should make quite a difference for you.
even moving from a 280mm to a 360mm with similar quality fans lowered CPU temperatures ~6° across the board for me.

whether the AIO should be mounted on the side as intake or top as exhaust really depends on the overall setup.
i would install the 360mm in the top as exhaust and add 3x more side fans as intake.
this way fan RPMs can be significantly lowered to cut quite a bit of noise and offer much better temperatures system-wide.

What fans would you recommend I get if I were to replace all of them? (I thought the 3 Corsair ones on the front were good, but judging by what you said, I guess they aren’t.)