Yes, the input and output CFM should be balanced.
Yes, the input and output CFM should be balanced.
Hello everyone,
I'm setting up a new gaming PC for the first time in more than ten years, and I'm also getting familiar with water cooling. I'm considering the Corsair 750D model. To handle 600W of heat, I need at least three 120mm radiators mounted on top.
I have some questions about the setup:
1) Should the fans on the top radiator be drawing air in from outside or pushing it out? The diagram indicates an exhaust configuration—two 140mm high fans at the front to pull air in, three 120mm fans at the top to push air out, and one 140mm fan at the rear to expel remaining air.
2) Another point of confusion is whether pushing hot air out would cause the casing on the left to be under low pressure. With four fans exhausting and only two pulling in at the front, it seems the left side might struggle. Would it make sense for the intake and exhaust fans to balance each other so the overall effect is neutral?
I hope this clarifies things. Thanks a lot!
The only factor that truly matters is whether you push warm air out through the system to cool the CPU or draw cool air into the system to lower its temperature. This involves a very minor adjustment in temperatures. You can opt for just a few degrees, but any change beyond that affects overall system or GPU temperatures more than it helps the CPU. The main distinction lies in using a radiator as an exhaust or as an entry point for airflow within the setup.
The only factor that truly matters is whether you expel warm air through the system to lower CPU temperatures or bring in cool air to achieve the same effect. This involves a minimal adjustment in temperature, and the decision comes down to a few degrees rather than significant gains. You have options between slight variations, but overall performance differences remain small—either a cooler CPU or worse system/GPU temperatures. This is the key distinction when deciding between using a radiator as an exhaust or as an entry point for airflow in a setup.
The only factor that matters is whether you manage heat effectively—either by pushing warm air out or pulling cool air in to regulate temperatures. This small adjustment can make a noticeable difference without significantly affecting overall system performance. Choosing between these methods mainly depends on how the radiator is positioned and how air flows through the setup. Generally, positive pressure is preferable for dust management. It’s not crucial whether the pressure is positive or negative, except for controlling dust accumulation. Dust tends to collect more easily when air moves through the radiator directly, so keeping a clean environment is key.
You can ask about measuring case pressure with a simple barometer, though it may not be very precise. The water loop helps cool the CPU, GPU, and motherboard, so all components are impacted. Regarding your concerns about fan placement, if the radiator is mounted top-mounted for exhaust, using a pull configuration might require repositioning the fans or mounting them differently to avoid dust buildup. Thank you for the thoughtful questions.
Hi,
Based on your setup, would the pressure inside the case become excessive?
13thmonkey :
you risk a pool of static air at the front of case as air just circulates at the back.
Thanks. Hmm in that case then I should configure No. 2 as exhaust i.e. pushing air out from the top of the casing right?
Thanks.
you face a chance of static air buildup at the front of the case since air only moves backward.
that's understandable. in that scenario, setting No. 2 as an exhaust would be logical—pushing air out from the top of the casing.