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Last summer your PC was fine, and winter passed without issue, so why is your PC overheating? Fans that pull in cool air (and also pull dust into the system) are known as intake fans, and those that blow out hot air are known as exhaust fans. Dust build up on intake fans: If you have filters on your intake fans (common in most higher end cases) to prevent dust getting into your system, over time this dust will build up and block airflow.
If the system can’t get enough cool air into the case, internal case fans (those found on your graphics card, CPU cooler and RAM) will simply circulate the warm air in the system, raising the ambient temperature and heating up components until they reach their thermal limit, which usually results in thermal shutdown. Dust build up on PC components: If there are no filters in on your intake fans, or dust manages to get in despite the filters, it can settle on your components as seen in the image below. While the dust won’t usually settle directly on major heat sources such as the area just above the CPU or GPU core, it will settle on areas not directly under internal case fans.
These are often passively cooled heat sources such as the motherboard chipset heatsink, the graphics card RAM heatsinks, and various parts of the motherboard PCB that are normally cooled by internal case airflow. The result is less dramatic than an overheating CPU or GPU, but it is harder to monitor since the main heat sources should report normal or slightly higher than normal temperatures. Holding the dust filters or radiators under running water usually clears most of the dust away, though be sure to dry the filters properly before reinstalling them. Dust is one of the main contributors of overheating PCs, and clearing it away will do wonders for your system stability in summer.
And remember to stick your moms old pantyhose over the intakes to prevent dust going in lol, but seriously i;ve done it and it works!
Just don't overdo the paint as then it fills the holes and makes the whole excersize pointless.
All you do is a cut a nice square the same size as your fan and then put it against the case before you screw it on. The idea here is to create a vacuum of sorts in the case by reducing air pressure, whereby the air flow moves quickly through the case from front to back.
I read that using the front intakes in addition to the rear exhaust would provide the best airflow. And if it makes any difference, my hard drive will have to be in the middle or lower bay slots due to my GPU's size.
For best case airflow you should put the fan in front and on the lower slot but if the HDD is on the way then use the upper slot.
Never going to log into this garbage forum again as long as calling obvious troll obvious troll is the easiest way to get banned. Also have more fans pointing in than out for least amount of dust settling inside the case.
I was under the impression that positive air pressure (more air coming in than pulling out) causes airflow issues, but also provides more cooler air coming in. Top intake is also a bad idea because it goes againist natural convection instead of aiding it. By using passive intakes you're gonna create negative pressure actually, so not sure where you're coming from. So I'm starting to get on the train of caring about airflow and cooling for my PC now that I got a pretty decent one.
Things to note about the picture above, a 2nd GPU will be added tomorrow, as well as 3 more fans, 2 big ones for one more on the top as well as on the side, then a smaller one which I think I'll place at the front. I had the H100I 2-fan original setup and installed it logically to outflow through the case top.
I too played around with intake vs exhaust with the h100i in an 750d case and found intake gave me better cooling temps by about 5 degrees.
I've heard similar things however I have not seen a difference according to any of the temp sensors on hardware. My CPU is idling at 33c, Motherboard temp is 30c-36c, and 6 HDDs all around 38c-41c which is exactly where they were before i switched to intake.

The only thing I can see is that everything has stayed the same while the cpu cooling has improved by about 5c and perhaps more in cooler seasons. My friend went from a 2013 deathadder and the only negative thing he had to say were the side buttons did not feel as good. It seems that my case doesn't support front fan, although the spec says that it's installable. The side fan you can either choose to have air blow in, or out, depending on the situation. Mak explains things to do when it reaches 70C and what other attributes can make your CPU grow even hotter (specifically on the GPU portion). If you're serious about it I would consider actually cleaning your CPU and re-applying some thermal paste. I have been looking at liquid cooling solutions due to my living in the tropics, and fans don't seem to do the trick.
If you plan on overclocking your computer, you will need to get better fans and heatsink or a liquid cooling system. If my computer is really heating up, I put a saltwater-ice packs (frozen salt water sealed in 2 layers of Ziploc bags) on either side of the tower along with on top of it and try to circulate the air inside the computer cabinet a bit. If nothing basic works, you can always replace your case fans with a couple of these suckers. If those, coupled with a good computer location don't get good airflow going through your machine I don't know what will. That will work, but it sounds like you do important stuff on your computer (you mentioned work progress?).
Installing a fan on a dekstop tower is really easy, and depending on what you buy you can do it under $10! It runs my core i5 OC'd at 3.4GHz and keeps it running at about 40C in a Arizona summer which I would consider a massive success. Normally a manufacturer will ship a case with pre installed fans in a configuration for best airflow, similar to the image below. The hot air swirls inside the case trying to escape, and as the ambient temperature rises, so does the temperature of the components until they hit thermal shutdown. If you’ve cleaned all the dust out of your system and are still experiencing issues, stay tuned for part two where we investigate how to optimise airflow in simple terms. Its mesh in English i think a very very thin wired one that is usually placed on the gates of houses and windows to keep insects out of a house.
This fan will blow inward.So the question becomes, should I reverse the direction of the top fan to blow up (exhaust), instead of down into the case? One of these will be the pre-installed rear exhaust, but I was wondering where I should put the other 120mm fan I have to get the most efficient airflow within the case. You want it as an intake so that you're not passively pulling air in through other areas of the case, but the closer to the floor, the worse it gets. One thing I want to make sure, is that I have the fans installed for the best possible airflow.
I'd think the bigger fans on top should blow air into the case, as then they would help cool the graphics card. Any tips for a nice guide or such that shows the "best" way of applying cooling paste on the cpu?
Thus turning it upside down in that case it will pull hot air into the power supply completely negating its purpose. And thats why i've come across a couple of situations, where im not sure what solution is the best for my build - including; What Fan-Pins do I use? Is it to make a fan intake at the bottom of the case and the two on the radiator as exhaust? Just be careful, It is just about 12 screws and a juggling act to mount the fans pointing the same way with the radiator movement restricted by the hoses and not banging the radiator into something expensive (like everything else in the case).

The fact that heat rises has nothing to do with anything really as long as you have the rear exhausting.
I'd say to open the baby up and clean out the fans and heat sink where all the heat is diverted with some compressed air.
A friend of mine with almost the same specs as yours (a 6 core Phenom) and a 2GB GPU had 6 fans running inside his CPU. I just opened up one side of the casing, put a big table fan next to it and used the table fan to blow over the motherboard.
I am running one of the older generation Pentium 4 CPU's (Prescott), and they tend to act like little frying pans whenever the sun gets overbearing. I have a tin roof and when the afternoon sun starts to beat down, my office literally becomes a toaster oven. If you dont want to blow money on that Liquid CPU cooler that was posted I'd suggest the Cooler Master Hyper 212 EVO, it works great and isn't too expensive. You then proceed to argue with him, and saying non-passive intakes are better than non-passive intakes, since you will accumulate dust. If I exhaust air out the h100i, out the top of the case, there is warm air outside the top of the case. But 70's ok too, as long as you let it dry for a minute.), and thermal paste (I recommend arctic silver). But maybe if I put some cold packs of frozen water on either side of the case, I can avoid my daily shutdown time. Its hard to gauge because the MB temp will vary but its in range and similar as it was with exhaust.
However If i intake the h100i, there is nothing but cool air outside my case above the h100i, and its blowing cool air into the case.
Nothing actually went up in temperature with the intake despite having read people mention similar concerns you mentioned about heating up other components. My CPU case is small that's why I really need some kind of air inside to prevent the CPU to overheat. I've heard one of the graphics card when running Crossfire gets less cooling than the other due to airflow and stuff.
That's the whole point to having case fans, so the argument that top fans should exhaust because heat rises is not valid. A quick look and its at 36c granted its throttled down right now and not doing much except accelerating a flash video right now. The only warm air outside my case, is towards the back near the wall where air exhausts out.
Also, the specs of your case say there's a spot for a front fan so I would definitely put one there as intake.
With two fans in intake or exhaust my CPU goes up to 50c when running Prime 95 stress test. If anything its blowing air in, and out through the back, while potentially cooling some of the hotter air inside the case directly under the h100i intake because its blowing cooler air in than it was exhausting out as an exhaust setup. But of course exhausing air out would feel warmer to the touch but as an intake its cooler.
I can understand if it means the warm hair inside the case simply doesnt get to exhaust as fast so it warms internally, but i'm not bringing warm air into the system. I'm actually bringing cooler air which is combining with the internal air to cool it as the rear pulls air out. I could very well be wrong but so far my temps support intake as being better in my situation at least.

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