In simple terms, a computer case can either have: To determine pressure, total the CFM of all the intake fans and CFM of all the exhaust fans. So my question is, should i flip the top fan to be an intake and leave the one on the back as an exhaust? Speaking of dust, you want to make sure that your computer remains as dust free as possible. Of course there’s the CPU and GPU coolers as well as the PSU playing into it. One of the best spots on a machine is the top of the case. Thanks for the feedback. There are several options for how a CPU cooler can exhaust heat from the CPU. Optimal air pressure with a computer case is one of the most discussed and debated topics in computer cooling. This means I have positive pressure happening in my case. High airflow and static pressure fans blow air through your PC, but they do it in different ways. Pure Wings 2 PWM. Aside from fans and vents the other major points of ingress include the many small gaps in the chassis and adjoining pieces. Determine where the PSU is intended to fit; this is typically at the bottom of the case in most modern chassis designs. Sure, you could take the “maximum power” approach of shoving as many fans as possible into and onto the case, but that’s far from ideal. Every fan features a cubic feet per minute (CFM) rating, which measures of the volume of air it moves in a minute. To avoid making your computer too loud, use fewer or quieter fans. I have 4 fans for my case, what direction should I have the airflow on each fan point to get maximum usage? We breakdown the best practices for making sure things don't overheat. Noisy fans remedy – Install fan gaskets, use rubber pins instead. Welcome to the official subreddit of the PC Master Race. Static pressure fans are great for radiators and case meshes, and use resistance to push heat through your PC build. Simplest way to check fan direction is to just plug it in and see which way the air flow is. You want to keep in mind whether any components are going to be stifled for air by any obstructions. Just be sure to avoid those tacky LED-equipped case fans in the office. Don’t say you’re doing it to make it quieter. Lastly, the fan airflow can be identified by the arrow markings on the fan housing. But the device introduced far too much impedance, especially at low speeds. Just be sure to actually clean the filters once in a blue moon. I have a NZXT H500 case, it has 1exhaust on the back and 1 on the top aswell and i have a NZXT kraken x62 for cpu liquid cooling and the radiator is mounted at the front with 2 intake fans. When pulling, you're getting even air flow over all of the fins. when you've got the fan pushing, there are dead spots that not as much air travels through, like around the corners of the rad, and the center of the fan. A single intake fan with no exhaust fan is positive pressure. Airflow Direction of CPU Fan This is all about my old Dell Dimension 4400's design. This way, the air that enters your case goes through a filter first. To properly air cool your computer, you need have enough case fans to push or pull air into and out of the case. PC Cooling: How to Set up Computer Case... Four Apps that Make Your Tablet a Second... 2019 Solid State Drive (SSD) Buying Guide. How can I change a fan from suck to blow? your first picture is wrong, fan intake is the open side on 99% of fans. To check the airflow direction of the fan, simply put a piece of tissue in front of it. My case came with 4 fans, 1x 80mm and 3x 120mm but I can’t find any info on the cfm rating of the fans.. Is there any software what I can install to get these ratings as most software just gives you if the fan is working or not and at what rpm.. Unique, airflow-optimized fan blade design; Up to nine silence-optimized fan blades; High-quality rifle-bearing (up to 80.000 operating hours) Pure Wings 2. It is an ATX case, Mid size with PSU on bottom. Please use our contact form for any further queries. I was wondering if having too many fans is a bit redundant considering the person using the computer will just be browsing the web and storing pictures. Negative pressure – More air is being pulled out of the case than being pushed in, creating a vacuum. (I know homie answered already above, but this sitting here unanswered still bugged me.) When looking at the fan so that the circular sticker with the Noctua logo is facing you, the direction of airflow is towards you and the sense of rotation is clockwise: Do you have a question concerning one of our products? If there is anything impeding your airflow, such as blocking the air from going through the vent from behind, a static pressure fan will be far more efficient. If exhaust CFM is greater, then you have negative pressure. If a blade is angled down and the fan turns in the same direction as the blade angle, it will blow forward. Computer fans are typically 12V or 5V. the direction the fan spins. By leaving filters dirty or covered in dust, you reduce airflow and cooling power. Determining Which Way Your PSU Fan Should Point. set out to solve — the airflow reaching the anemometer blades was no longer swirling, so the spin direction of the fan did not affect the measured airflow. Does this configuration compromise the intake cfm’s? More case fans means higher total CFM and more air being moved through your computer. To avoid making your computer too loud, use fewer or quieter fans. Different flow affects dust build up just as much as the case and house itself. Computer Fan Airflow direction? So the open side of the fan should face outside the case for intake fans on the front or the bottom, and it should face inside the case for fans on the rear or top. The first image of the fan has been replaced. The Rear or Exhaust side (the side that the air comes out of) of our fans will always be the side that houses the fan motor. By changing the direction a fan is mounted, it can act as either an intake or exhaust. Air should travel in clear path through the case. You’ll actually make it louder. More details In these type of PC cases, the position of the PSU fan should be kept down only, because they generally don’t have vents at the top panel, but if somehow your case has top vents for PSU, then you can keep the fan position in upwards direction for better airflow and cooling performance for the PSU. The only problem is i cant remember which way the rear case fan was facing. There needs to be rhyme or reason to the setup or else it becomes something wholly inefficient. Negative pressure would mean that air is being sucked into your case from all the tiny gaps you can’t control and don’t have filters on, which means less efficient cooling over time. Build Help. You want as close to a laminar flow as you can get, which just means as smooth and unobstructed as possible. When building your computer, be sure to configure your cooling system with the principles outlined above in mind. Otherwise, all the airflow in the world won’t help much to cool down your components. Ensure a good airflow in your computer – Make sure fans don’t “conflict” each other. A single exhaust fan with no intake fan is negative pressure. I have one in the back of the case, two at the very bottom, one in the front. I'll be placing this towards the front of the case, with the radiator closest the motherboard, but I'm confused as to whether I want the fans to draw air into the system, or to pull the air out of the radiator and push it out. S ): computer fan airflow can be identified by the arrow markings on the fan housing mounted! Heed the placement of the fins … ] cold air and pushing out hot will! 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