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What would be best possible air setup?

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post #1 of 45 (permalink) Old 01-07-2020, 04:18 PM - Thread Starter
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What would be best possible air setup?

This is just something I've been rolling around in the 'ol noggin. If you were building it all from the ground up, it seems that you'd want to take advantage of the fact that heat rises. So your cpu's heatsink would be facing the top of the case, and the fan attached to it would blow air in that direction. There would also be a fan in the top of the case, just above the cooler. As so many cases have. This would help the warm airto just keep on traveling upwards and out of the case.

Your card would have a squirrel cage fan, and blow air out the back of the case. So the card would contribute to temps inside the case as little as possible. The PSU would not even be in the case, once again so as to contribute no heat. Maybe extension cables could be used for the PSU... some way or another for it to be outside the case. I think the Not From Concentrate boutique builder did something like that once. Rigged up a PSU to be outside of the case.

Lastly, have a single fan on the front, and a single exhaust fan on the back. So we keep ambient temps in the case as low as possible. Along with excellent cable management. I guess the best cooling setup would be to use an open air case, and just dust the thing regularly. But I'm talking about a standard computer case, not a dust magnet. Anyway what are your thoughts on the perfect air cooling setup?

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post #2 of 45 (permalink) Old 01-07-2020, 04:28 PM
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best?

step one: lower room temperature to -273.144 C
step two: fin

https://timesofindia.indiatimes.com/...w/44907265.cms

any other idea either isn't the best or it isn't possible


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post #3 of 45 (permalink) Old 01-07-2020, 04:42 PM
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The Pook is spot on. But if you can't chill your room quite that cool, the actual best case air cooling is achieved by servers. If you look at how a server is designed, the box is completely sealed with only openings in the front and back. Fans pull air in the front and move it at a very high speed across all the components before expelling it out the back. Linear air speed over the components is the most important metric when you are cooling components with air.

Many cases out there have venting all over the place and that ruins any kind of evenly distributed, front to back (or bottom to top) airflow. Even the good ones like a Fractal case still would need to work to really seal it up well.

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post #4 of 45 (permalink) Old 01-07-2020, 04:47 PM
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If heat rises in your case then you aren't moving enough air

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post #5 of 45 (permalink) Old 01-08-2020, 07:10 AM
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'Heat rises' is false belief. What heat does is cause air to expand/become lighter .. so warmer/warmer air is ligher than cooler/heavier air so it moves up, but in our applications with even a very weak fan the fan is many times more powerful at moving the air .. in other works forget all about warmer air rising because fans easily overpower it.

Mounting cooler to flow air up is problematic;
1/ Case airflow has to turn at least once (air coming in front of case) or twice (in bottom, over GPU turning toward mobo, then turning up into cooler.

2/ Turning airflow 90 degrees creates a lot of turbulence and turbulence disrupts airflow lowering volume of airflow reaching cooler.

You would be much better off using a case with good front to back airflow with a couple good front intake fans, removing all PCIe back slot covers to increase rear vent area around GPU thus better front to back airflow, lower air temp into coolers thus lowering component temps.
If you want a bottom to top airflow case, Silverstone has some you might want to look at.
Honestly, a case with good venting front and back with good fans cools very well without needing to use noisy squirrel cage fan GPU.

As PSU draws air in it's van vent and out it's back, why remove it from the case?

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post #6 of 45 (permalink) Old 01-08-2020, 04:26 PM - Thread Starter
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Well I guess I should have been more specific lol. I figured it would be obvious from the wording in the op that I meant something most people could achieve at their house, with common ambient temperatures that you'd find in the houses of the world. Of course that will vary, but not by hundreds of degrees.

Anyhoo, as for the PSU, I was thinking that you might get some small measure of heat soak going on. If you could put your hand on it (or under it) anywhere and feel some heat, that would be heat that was radiating out into the case. At least to some small degree.

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post #7 of 45 (permalink) Old 01-08-2020, 04:59 PM
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You could get a test bench and put a box fan in front of it. Any major dust would just blow off from the pressure of that fan. If you need a case, something like the carbide air 740 would be a good start. Graphics cards love that bottom intake.

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post #8 of 45 (permalink) Old 01-08-2020, 05:19 PM
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Quote: Originally Posted by PhotonFanatic View Post
Well I guess I should have been more specific lol. I figured it would be obvious from the wording in the op that I meant something most people could achieve at their house, with common ambient temperatures that you'd find in the houses of the world. Of course that will vary, but not by hundreds of degrees.
You got your answer from a few different people in a few different ways, @The Pook and @doyll have given you the following insight; fans, directed air flow, and lower ambient temperature. The best air setup is a nice cool room and a good fan setup. Orientation does not matter compared to directed air flow and air temperature, as convection in air is weak, and therefor should not be considered in the design.

With the PSU, you should orientate it so the majority of hot air is directed out of the case. If there is still heat radiating, setup fans that will pull air from outside,across the psu, and out the back of the case to remove this heat from the case.
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post #9 of 45 (permalink) Old 01-08-2020, 05:56 PM
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The idea of overturning the standard front-to-back air cooling plan and doing away with all that heavy, RGB friendly glass is not so far fetched, to my way of thinking.
The pattern of PC building that concentrates on cooling the GPU and the CPU that has recently been disrupted by the developement of M.2 storage between the PCIE connectors is about to be further disrupted by Renoir and the prospect of a powerful, 8 core 16 thread APU.
So it becomes reasonable to think of isolating the cooling channels in a server/HTPC build from each other by switching from a horizontal to a vertical plan in the older, non water cooling type of case with drive cages behind the front panel.
A twin tower cooler with 140mm fans blowing up through each tower from beneath and a powerful 140mm top case fan would create enough suction to negate the disadvantage of having a 90 degree turn at the foot of the wind tunnel using a side fan above the PSU blowing cool air onto the M.2 storage.
Drive bay cooling could then be designed for blowing cool air from below and from the motherboard side of the case and expelling it above and from the other side of the case using double doors on both sides of the case to hold the fans.
Further cooling could also be attempted on the back of the motherboard, drawing cool air up over the rear of the CPU socket and the VRM arrays with another side fan.
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post #10 of 45 (permalink) Old 01-08-2020, 06:05 PM
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I have 5x 120x38s on a controller in my case and a TY147A for 4 in 2 out and have no problems with case flow. My glass panel doesn’t get warm at all. Problem is people want silence, and high performance.. not gonna happen. 50cfm fans are laughable in my opinion, no matter how many you have. Dust filters are good for filtering air, but not helpful when it’s air you want to move. I have an open bench and get far better results in my case.

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