Cables, especially the large bundled rails from a power supply, can be especially troublesome. Most large cases include a system of holes and guides that allow users to thread these cables away from the main open area of the case, often behind the motherboard tray.
Get as many of these cables out of the way as you can. Most cases include multiple mount points for case fans—sometimes even more mount points than included fans. Similarly, be sure to make use of all of the spacers that came with your case for unused PCIe slots, 5.
Ideally, you want to place an exhaust fan as close to the CPU as possible to quickly expel this hot air. A side-mounted fan expelling or drawing in air in a direction perpendicular to the motherboard might be useful here, but not all cases support that. If you have a large aftermarket CPU cooler, it probably has one or more fans of its own. Most CPU coolers can be mounted in any cardinal direction to help achieve this and to make it easier to clear other internal components.
Remember, case fans draw in air on the open side and expel air on the grille side. Think of a PC case as an enclosed box, and the air going in or out of each fan as roughly equal. Assuming all the fans are the same size and speed, then you have one of three possible options for the air pressure inside the case:. You want at least one intake and one exhaust fan at the very least, so assuming you have more, which is better, drawing in more air for positive pressure or blowing more out for negative pressure?
Both approaches have their advantages. Negative air pressure should create a slightly cooler environment at least in theory , as the fans are working harder to expel hot air. But the drawback is that the slight vacuum it creates inside the case tends to draw in air from all the unsealed areas: the vents, unused PCIe slots on the rear panel, even the seams of metal in the case itself.
Opinions on positive versus negative pressure is mixed. In reality, PC cases are so far from being a sealed environment that the difference is probably negligible. Even the most carefully-constructed build will accumulate dust from the surrounding room, and if you live in an especially dry, dusty environment, or you smoke, or have pets, etc. Check your PC for dust buildup regularly.
More dust means less efficient cooling…not to mention looking totally gross. Every six months or so, or more often if you live in a particularly dusty area, open up your computer and blow it out with some compressed air to get rid of any lingering dust. To prevent dust, slap some dust filters on your intake fans.
Clean them out with water and dry them completely every few months to keep dust from flowing into your case again, slightly positive air pressure can help here too. Most cases sold for system builders come with some kind of dust filter, but if you need more, you can buy some nice magnetic ones in different sizes for your intake fans.
But for the sake of completeness: water cooled components have a minimal effect on the internal airflow of a case. The radiator and fan combo itself can be mounted to the front or bottom for intake or the rear or top for exhaust, but it will be less efficient than a fan alone.
If possible, mount your radiator and fans as exhaust fans. Putting them in an intake position will warm up the air via the radiator as it comes into your PC…which is basically defeating the purpose of water cooling your components in the first place.
Browse All iPhone Articles Have it blow into the sink to move air across all of the other components around the CPU voltage regulators and such that get a bit hot.
Best way to find out for your current setup it to find its max overclock one way and the the other At least thats how I do it. RichPLS Champion. Aug 24, 15, 0 50, 0. Aree, it should blow down to the processor letting sucking the case air down and over CPU circulating cooling chipset and mem also.
So down it is. Are we in agreement now. Thats interesting. Thats the reverse of the way it is normally done. However, either will work, depending on your setup. I believe most case circulate air in through the front and out the back. The most important thing to remember is to move air from the coolest source you can get to the nearset exhaust you can get. Dec 29, 3, 0 22, I've seen benchmarks where in some cases it was better to have the fan suck air up from the CPU and others where it was better to blow down on the CPU That's what I did and I believe I saved an extra degree or two.
In this case I'm not sure there is a right answer, but I could be wrong. It may play a little into OCing, depending in the rest of your setup. Dec 31, 7, 0 25, 6. Do some research. And the reverse way is never the standard setup. Every HSF solution on the market blows air on the heatsink. Enthusiasts and what not are the ones who reverse it. Vascular Distinguished.
Jan 1, 0 18, 0. LOL some people crack me up. Your stock CPU fan will not work well you reverse the rotation. This increases air volume so that lower rotation speed can be used. If you reverse direction alone you are hurting performance of the fan. CPU coolers always blow across the the heat sink to maximize coverage area. If you suck air away from the heat sink you lose a lot of area for reason that air always take the least line of resistance and will only pull through the outer most fins thus overheating issues.
PCplus also has a mm fan blowing out rear, along with 80mm fan blowing duct to CPU for cool air. Damn good cooling with LianLi PCplus case. Well, the mm CPU fan is now setup blowing thru the SI's HS, and it works like a charm The air from under the fins gets vented out of the case by two mm fans, top and rear p Crashman Polypheme Former Staff.
Dec 31, 48, 88 66, Should my computer fans be sucking or blowing? Tip If the computer power supply has an intake fan and a fan that blows hot air out the back, a back computer case fan may not be necessary. Additional information How can I tell if a case fan is sucking or blowing air? What should be the temperature of my computer processor? Most cases have a front-to-back airflow: air goes in at the front and out at the back. Reasons for this direction include the location of the power supply unit at the back a major heat generator, so its air must be evacuated directly and the preference not to blow hot air towards the user of the computer.
The airflow is usually achieved by having an outtake fan at the back, often another outtake fan on the power supply unit, and sometimes an intake fan at the front. As mentioned before, a PSU outtake is often required, and two fans in the same direction provide more airflow than one in each direction, which explains why outtake fans are more common.
Another reason to prefer outtake fans is that intake fans tend to accumulate dust which isn't a concern if you're willing to dust the inside of your computer often. If you're interested in the topic, I recommend reading articles at Silent PC Review , one of the few hardware sites where people measure other things than frames per second. The site is about reducing noise, but since fans are the main source of noise, they discuss airflow a lot.
Well usually fans in front and at the side of the case blow air inside while fans at the top of the case and at the back blow air outside. Fans which are in expansion card format usually blow air out too. Sign up to join this community.
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