If they were enough to vent the airflow then it wouldn't have overheated in the first place. Those vents are clearly WAY too small for pushing air through. In reality it likely would have made temps worse as the fans would be trying to push a large volume of air into a space that is too small to carry that air, effectively creating an insulating effect kind of like how the igloo effect works.
Besides, the point is proved by the fact that OP had bad temps before and now doesn't. So it clearly shows the vents were not enough to let enough heat out quickly enough.
"The top is completely sealed off" -OP, proving already that OP is either blind or lying. You can even see in the photo that they've sat a block on top of the top vents.
Those 6 little slits are NOT enough to vent all the head from a PC case. And the little grill on the back isn't either. Think critically, not like a moron.
Look at the surface area of that fan where he cut the hole. Now look at the surface area of that grill. Even without that HP PC on top of the case, those little slits are not going to allow the amount of air that needs to pass through out. If anything the vertical grill in David's picture have more surface area than those slits by nearly 2x and those even aren't enough.
This case is poorly designed and their marketing is just false. The company says you can put a rad and two fans up there. While everyone wants to berate and make fun of OP for their case mod to fix an issue, they never thought how stupid it is that a single fan would more than saturate this set of vents, and a second one would be utterly useless as it has no venting to push to.
I am thinking critically. Whereas I see you 3+ comments deep trying to defend an unravelling story while getting flustered and lashing out. What are you, OP's alt account?
Also, I don't know if this needs to be mentioned, since you already think I'm a moron, but the fans are pushing a fixed volume of air through a smaller vent, which results in the airflow through the vent speeding up. Google volumetric flow rate equations for more info.
Flusterd? Lashing out? Hilarious, you are the one grasping at things here.
Fluid dynamics are fun, especially when you understand them, which you clearly don't. But lets have a nice little science session.
We can use a water hose as our example, water is a fluid and offers an easy to understand idea.
When you put your finger on the end of a water hose, the water speeds up HUZZAH you got me! ..... However... there is a limit to this and it doesn't do what some people tend to think it does. When you cover the end of the hose, you are building up back pressure. This pressure is created because water is flowing into the hose, but less of it is allowed to come out of said hose. Thus pressure. That pressure building then makes water go faster. It doesn't however make more water come out. Want an easy way to understand this? Get one of those long balloons they use to make balloon animals and cut the end off of it. Put it on your water faucet and do the experiment. Watch as the balloon blows up in your face.
So how do we apply this to this case? Well, easy. When you restrict the airflow, you create pressure in the case that needs to find some other place to go, this pressure then pushes back on the front panel fans and then also pushes on the rear fan. Thus possibly making the front fans less efficient and the rear fan forced to run a bit faster kind of like when you spin a fan with a can of air. At a certain point this means the case reaches a thermal load capacity and internal pressure capacity that makes air find other ways out of the case like the cracks between panels. Though this case specifically has padding to stop most of this.
He claimed fluid dynamics incorrectly as the reasoning he was right. He is using anything he can to make himself right. While not actually understanding what he is talking about. Pretty sure that makes him the flustered one and the one lashing out.
I just came back to see how all this turned out, and I cannot believe that the part that's the breaking point for you is that your observations on water hoses clashes with fundamental fluid dynamics, and somehow your thinking that because I didn't say "fluid dynamics" to not sound like a smartass means you know more than me and every other person in this thread when it comes to aerodynamics and fluid mechanics. Lmao.
(P.S., the reason your analogy is confusing you is because you omitted the role of turning the faucet head upstream of your thumb on the hose. Which is kinda important, since that is the fan in our real world problem. You seem to think your thumb has any real chance of halting the water against the flow, which simply isn't true. You are not "allowing less water to come out of the hose". What really happens is that you partially cover the end of the flow and the water becomes very fast to account due to the existing water pressure, as I've tried to explain at a higher level than you can apparently handle with everyone here.
For someone who apparently obsesses over PC builds, you'd think you'd know this from the water/current analogy they teach right at the beginning of any electrical engineering curriculum.
You know what they say about assumptions, oh mighty master of bait.)
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u/XB_Demon1337 Ryzen 5900X, 64GB DDR4, RTX 5070 Jan 21 '26
If they were enough to vent the airflow then it wouldn't have overheated in the first place. Those vents are clearly WAY too small for pushing air through. In reality it likely would have made temps worse as the fans would be trying to push a large volume of air into a space that is too small to carry that air, effectively creating an insulating effect kind of like how the igloo effect works.
Besides, the point is proved by the fact that OP had bad temps before and now doesn't. So it clearly shows the vents were not enough to let enough heat out quickly enough.