As far as the direction goes, if you have a fan location in front of your hard drives, you of course want the fans blowing towards the hard drive, and not the opposite. PC Cooling: How to Set up Computer Case... Four Apps that Make Your Tablet a Second... 2019 Solid State Drive (SSD) Buying Guide. Neutral would be when intake and exhaust CFM are equal. (the side with the guard/motor support) Lastly, the fan airflow can be identified by the arrow markings on the fan housing. One of the best spots on a machine is the top of the case. Ensure a good airflow in your computer – Make sure fans don’t “conflict” each other. Side-mounted fans should be used for intake, though they often don’t have air filters. You can’t really control airflow at these points unless you want to put caulking or sealant in your case. Your negative pressure graphic is not likely as you would never exhaust out the front. The fan mounts in the square cut-away. NEWSLETTER. Aside from fans and vents the other major points of ingress include the many small gaps in the chassis and adjoining pieces. It is an Akasa fan. Finally, faster fans … A self-professed tech hipster that loves computers and music. I noticed that there were only two fans installed on my computer - a CPU Fan installed at the back of the casing with a duct heading towards the heat sink (no fan on top of the heat sink) and the other is the exhaust fan of my PSU - all are exhaust, meaning, they all pull hot air out. Neutral pressure – Air pressure in the case is equal to air pressure outside of the case. To properly air cool your computer, you need have enough case fans to push or pull air into and out of the case. You really could have spent a little more time on this to make it easier to comprehend for the beginners. But once you have your optimal cooling path planned out, it’s all about […], […] PC Cooling: How to Set up Computer Case Fans […]. For details on achieving optimal computer case air flow, see our case fan setup guide for more information. Noisy fans remedy – Install fan gaskets, use rubber pins instead. How to determine the airflow direction of your case fans. Source(s): computer fan airflow direction: https://shortly.im/4Qaoj. If exhaust CFM is greater, then you have negative pressure. You should also heed the placement of the fans. By changing the direction a fan is mounted, it can act as either an intake or exhaust. (I know homie answered already above, but this sitting here unanswered still bugged me.) When building your computer, be sure to configure your cooling system with the principles outlined above in mind. […] cold air and pushing out hot air. 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. Please describe your reasoning for changing the airflow direction. Please use this form to pose a question! This means I have positive pressure happening in my case. Also, flashing multi-color lights shouldn’t be the main feature of your case fans. 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. Air should travel in clear path through the case. More details We break down the fundamentals of air cooling your computer so you can avoid a Chernobyl-like meltdown. If you are searching for a new chassis for all that futuristic tech you’ve just bought, there are a few things to consider when it comes to airflow optimising. I had an expensive gaming computer built and I noticed they installed the cpu liquid cooler radiator w/ (2) 120mm fans over top of the (3) 120mm case fans at the front panel. Don’t say you’re doing it to make it quieter. I'm building a smaller computer for a family member and its an Antec P50 case. To change the direction of the air moving through a fan you can take out the screws, and then flip the fan over. Speaking of dust, you want to make sure that your computer remains as dust free as possible. Positive pressure – The case fans push more air into the case than then pull out, so there is more air pressure inside of the case. Generally, you want the case fans in front of the case drawing in air while the fans at the rear blow air out. heh i am just showing you a pic from my pc that the airflow is totally different because there is a watercooling system on the cpu, i hope that the picture is self explanatory for all. Every fan features a cubic feet per minute (CFM) rating, which measures of the volume of air it moves in a minute. Determining Which Way Your PSU Fan Should Point. Negative pressure – More air is being pulled out of the case than being pushed in, creating a vacuum. Use proper fan positioning. 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. So I've purchased a H115iv2 cooler, and will be placing this at the very front of my case, but I'm confused about fan direction and air direction. Of course there’s the CPU and GPU coolers as well as the PSU playing into it. 2X Top slots (1 in front of the other) 1X Front slot ( bottom of front under expansion bays) 1X Rear 1X Side panel All slots fit 120mm fans. Difficult to attain unless you leave the case open. 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. Optimal air pressure with a computer case is one of the most discussed and debated topics in computer cooling. Just be sure to actually clean the filters once in a blue moon. Computer fans are typically 12V or 5V. 0 0. 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. High airflow and static pressure fans blow air through your PC, but they do it in different ways. By leaving filters dirty or covered in dust, you reduce airflow and cooling power. This can sometimes happen with smaller cases fitting for mini-ITX motherboards, but even some larger cases have designs which are more favourable to certain GPU and cooler design… When pulling, you're getting even air flow over all of the fins. 140mm PWM 120mm PWM 92mm PWM 80mm PWM 140mm PWM high-speed 120mm PWM high-speed. Airflow Direction of CPU Fan This is all about my old Dell Dimension 4400's design. Air travels one way through a fan, in one side and out the other. To avoid making your computer too loud, use fewer or quieter fans. A single exhaust fan with no intake fan is negative pressure. 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