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Do top down coolers work in closed panel cases?

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post #1 of 24 (permalink) Old 03-19-2019, 09:35 AM - Thread Starter
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Do top down coolers work in closed panel cases?

By closed panel I mean a solid side panel with no vents, eg most cases with a glass panel. Seems like the lack of air coming in would be an issue but does it make a substantial difference?

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post #2 of 24 (permalink) Old 03-19-2019, 09:55 AM
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airflow should be directional, air coming in from the side panel is negligible.


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post #3 of 24 (permalink) Old 03-19-2019, 09:58 AM
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They work no problem. Depending on the orientation of the fan (blowing downwards or sucking air from the heatsink), a side panel vent/fan may be beneficial.

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post #4 of 24 (permalink) Old 03-19-2019, 01:15 PM
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of cos they work

even worse case scenario (poorly ventilated case) they still help even out the temperature inside the case by blowing the harmful hot air off the CPU & VRMs



btw I only use "closed" cases (no side or top opening, only front & back) - that's cause I tend to put stuff on top of the case like beer or something, plus ain't the first time I splashed beverage or something (I live in a small room) and if my case had a side opening I'd have busted my PC lol

that's why cases with side (and worse, top) vents are a crappy design they're accidents waiting to happen - intelligent case design is with air vents on front & back ONLY
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post #5 of 24 (permalink) Old 03-19-2019, 01:52 PM
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It hasn't been that long since all coolers were top down.

Thermalright XP90C
Alpha Pal 8045

both epic coolers in their day.

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Last edited by Wihglah; 03-19-2019 at 02:55 PM.
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post #6 of 24 (permalink) Old 03-19-2019, 02:51 PM
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Most cases have positive pressure so it doesn't matter.

The airflow you are thinking of would only be a factor if the case had no fans.

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post #7 of 24 (permalink) Old 03-19-2019, 02:52 PM
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Quote: Originally Posted by Wihglah View Post
It hasn't been that long since all coolers were top down.

Thermaltake XP90C
Alpha Pal 8045

both epic coolers in their day.

Wish I still had my Thermalright SI-128 SE, that thing was great

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post #8 of 24 (permalink) Old 03-23-2019, 11:25 AM
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Quote: Originally Posted by S.M. View Post
Most cases have positive pressure so it doesn't matter.

The airflow you are thinking of would only be a factor if the case had no fans.
Please explain how 'positive pressure' in case makes any difference.

To me the key is not 'positive pressure' in a case but a case that flows room temperature air to component coolers and flows cooler's heated exhaust air on out of case without it mixing and heatiing room temp intake airflow is supplying to coolers.

You might find link below to how airflow works and how to optimize case airflow of interest.
https://www.overclock.net/forum/22319249-post5.html

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Last edited by doyll; 03-23-2019 at 11:40 AM.
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post #9 of 24 (permalink) Old 03-24-2019, 06:22 AM
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Quote: Originally Posted by doyll View Post
Please explain how 'positive pressure' in case makes any difference.

To me the key is not 'positive pressure' in a case but a case that flows room temperature air to component coolers and flows cooler's heated exhaust air on out of case without it mixing and heatiing room temp intake airflow is supplying to coolers.

You might find link below to how airflow works and how to optimize case airflow of interest.
https://www.overclock.net/forum/22319249-post5.html
There is very little understanding of the positive/negative pressure aspect here. Yes, slightly positive pressure will be a nice help with keeping dust out of the case and will not really negatively impact cooling to an extent that matters. But overly negative pressure has detrimental effects on cooling - uh, hello....case is pressurized, your intake fans are treading water (well....air in this case) trying to overcome pressure that they can't, hot air isn't getting out quickly enough....you built a convection oven (I'm looking at you Mr. IPutIntakeFansInEveryPossibleLocationBecauseTheAir WillGetOutThroughTheCracks). And positive pressure certainly does not somehow miraculously make airflow channel to where you want it.

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post #10 of 24 (permalink) Old 03-24-2019, 07:35 AM
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It's very hard to get "positive pressure" or "negative pressure" in a PC case unless you purposely try to achieve it (and it will take some substantial modifications). Air and pressure will equalize regardless.
The key parameters you should be looking are case design (vents, internal layout), how much air your fans can push under restriction, and the other hardware components you plan on using.

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