Chassis Fan Pressure / Case Cooling

Catastrophe803

Reputable
Sep 11, 2014
27
0
4,540
So... I've come to you all for some help, and I have a very strong feeling that I would get my answer from her. Basically, I've run into a stumbling block when attempting to redesign my cooling structure in my PC so I can hopefully achieve better cooling, including replacing my CPU cooler for something else.

My stumbling block is I don't know whether or not I should opt for positive or negative pressure(I'm sure this problem has been met multiple times a day by many people, but I feel that my situation may be a bit different) so I will give out my ideas and I'll see if anyone can tell me what airflow and cooling results I would receive.

First, my case is the Thermaltake Chaser MK-1. I plan to use a 200mm case fan, AirFlow(maybe?) as intake at 110CFM. Second, I plan to use a 120mm airflow case fan(probably a thermaltake riing at 40 CFM or a corsair ml120 pro at max of 75 CFM) as intake to drive air given by the front exhaust and drive it upwards into the case and such, although my gfx card may block a good bit of it. I plan to use another 200mm intake fan, airflow at 110 CFM and blow directly on the graphics cards and slightly above it, and let that 120mm fan also direct that air into the higher levels of my case.

Now for CPU and exhaust, I plan to buy a 240mm aio and place one or two 120mm fans, static pressure, and have air move into the rad and have another two 120mm fans(I don't know if I should use airflow fans or static pressure for this) pull that air out of the rad, Everyone would be top mounted, and then I would still have my two 200mm fans, airflow, up top as exhaust at 110 CFM each. The radiator itself, may have a negative pressure configuration so it can move the hot air out faster. And my last back exhaust fan would be another 120mm fan, airflow, at likely 45 CFM to move whatever's left out the back but I highly doubt anythings there, but I don't want dead space.

For anyone who prefers TL;DR, my case itself may have slightly positive pressure assuming the case fans are alright being behind a filter, while my AIO system may have a negative pressure. Is this something that could work, and any tips to help me out in this? And any pointers on whether I should use static pressure fans for the fans pulling from the rad and should I use an airflow fan for my front intake even though there's a HDD cage there that I can't move? Thanks!
 
Solution
You want positive pressure. Negative pressure creates dust problems because air gets sucked in through little cracks in the case where there aren't dust filters. Ideally you will want neutral pressure, but that is hard to get. Just do positive.

I would have 2 very high airflow 120mm fans in the front intaking and one in the back exhausting. For the radiator I would have two static pressure fans exhausting out the top.

telipinkerton

Commendable
Feb 6, 2017
4
0
1,520
You want positive pressure. Negative pressure creates dust problems because air gets sucked in through little cracks in the case where there aren't dust filters. Ideally you will want neutral pressure, but that is hard to get. Just do positive.

I would have 2 very high airflow 120mm fans in the front intaking and one in the back exhausting. For the radiator I would have two static pressure fans exhausting out the top.

 
Solution