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Yes.
2 x Front Intake
1 x Rear Exhaust
1 x Top Exhaust
Side panel off can actually make temps worse as cases are designed for better airflow inside instead of random airflow without the side panel
If you're going to test temps with and without panel don't use games. They aren't consistent in what they use and generate. Use a benchmark or stress test.
3Dmark has some to test the whole system
Prime95 if you just want to test the CPU.
I'd go with Prime95 as it's free. It'll put a huge load on the CPU and generate high temps, temps you won't see in gaming, but it's a controlled situation where it'll run the same everytime you run it so you have a consistent test. Good for if you want to try different fan positions and speeds. Can be nice to compare a new CPU cooler with your old one so you can see how much better it cools.
Oh and keep a note of ambient temp when you do your tests as that will also affect comparisons.
But in general if you open the side and put a fan that blows new air from the lower half from the side, cooling is good as well.
For a case that has front and rear places for fans, the most effect is one at lower front, one at upper back.
Then 2 in front one in upper back add reasonable more.
Top fans and any other configuration do not add much benefit beyond that. Or even make it worse. Especially if two fans with opposite blow are placed too close or against air physics position.
Now I want to go get a big balloon and place it over a fan.
For case cooling i would choose one which has a good mix of high pressure and high air put through.
Only if there is no obstacle at all in a pure air channel (no filter, no object) highest airflow with therefore lower pressure fans are optimal.
Otherwise the mix of both is best in usual cases of...... cases.
Oh i dunno..
Maybe because its an option to?
There are cases where top fans ARE intake?
With it being pushed down the rear exhaust will get a boost of air going out in addition to the CPU/Cooler getting additional cool air pushed onto it even if it isnt much due to "Physics"
Just because you dont understand the idea behind something doesnt mean its wrong.
That does not mean i dont understand the idea.
The rear fan does not need a boost of air from the top to put air out. Its purpose is to only take air out that got warm from anywhere in the case. The other fans are there to transport cool air in and also push the warm air away in one direction.
If you blow from the top inside, you rather avoid the warm air reaching the fan that waits for it on the side.
Aside from that, you want intake where air is cool. On top you might just blow the warm air back in that luckily found its way out on the top side a moment ago.
With rear as exhaust and then the top_rear as intake will result in it sucking some of the warm air from the rear exhaust back in cutting the reason for an intake fan. Same as if you put 2 top fans in next to each other with one intake and other exhaust. They'd both be pulling some of the air the other is pushing thus reducing there effectiveness. Could be offset if the Top_Rear is exhaust and the top_front is intake leaving the top_mid empty.
Having intakes at bottom is better. As cooler air sinks so the air at the bottom will be cooler than the top = better cooling. Rear and top as exhaust works better because the warmer air is already, naturally, moving in that direction.
Not only that, but the airflow caused by pretty much ANY fan is WAY more than enough to overcome the natural convection of warmer air rising, so you're not "doing anything bad" to push air down.
Just working against natural physics. That alone isn't the issue. The issue is having and intake so close to an exhaust fan. The intake will be sucking in some of the warmer air the exhaust kicks out thus reducing it's effectiveness. Plus the exhaust will be trying to suck the fresh air from the intake straight out..... albeit some of that would warm air it just kicked it anyway. So the same air with go out, in., out, in in a circle.
By all means make the top intakes just by sure to leave 1 or more fan spaces free so they are aren't sucking in some of what the other kicks out.
In my case, my top fan is in the middle-ish and is intake, and serves to attempt to bring in fresh air right in front of the CPU cooler (tower style), as my two intake fans in the front are largely obstructed by many hard drives, and mostly position more towards the lower half of the case (where the GPU is). Having it as exhaust would mean it and the CPU fan are fighting for air from the same space. Having the top back as exhaust would seem pretty useless as the rear back fan just continues to pull what the tower style CPU cooler does (which has a second center fan) so I don't use one there.
I've tested this and got just slightly better results with it as intake versus not there, but that was on my old system (Core i5 2500K and Xigmatek HDT 1283/Dark Knight) and admittedly have yet to retest it with my current hardware in the same case (Ryzen 7 3700X and Be Quiet Dark Rock Pro 4) as I recently upgraded from the stock CPU cooling. So, this very much could have changed for me.
You seemingly didn't understand what I said.
What I was saying is that there's a common misconception that blowing a fan in a direction that goes against the natural convection that warm air rises is awful simply because of that fact, and you pretty much stated just that where CJ replied to you.
"There is no one right way to do things. A lot of people will tell you that you need to have the top be exhaust, but that's absolutely not true. Whatever gives you the best temps is what you should do."
And i agree, whichever works best is fine.
natural convection is negligible when there are fans disrupting airflow and the fans change the airflow more than what naturally rising heat affect.
.
Yes its always been the norm for top fans to be exhaust, but every case wont have the same airflow patterns for one reason or another.
Not to mention a case with 2 rear exhaust fans shouldnt have a problem with a top intake, all depends on the case and the fans themselves.
Theres plenty of topics available online regarding Top intakes.
To make it simple: If blowing from the top was a good idea, the topic creator would not have a hot computer case material. The top fan blew down.
Irony?
Whether or not she had the Top fan as an intake is irrelevant, the case lacked proper cooling and airflow as a whole.
Her case has 5 fan positions and the case only came with a Rear while another fan was placed at the top INSTEAD of in the Front, as such even if the top fan was initially set as an Intake its not doing much because the airflow is limited.
That aside
her CPU cooler doesnt seem to be doing a great job in itself either even with the side panel off.
So no
her temp issues are not simply because of the position of ONE fan.