Also, flashing multi-color lights shouldn’t be the main feature of your case fans. Uses an iPhone ironically. Don’t say you’re doing it to make it quieter. 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. Do: Mount the radiator so its airflow is not impeded by other devices in the machine. Of course there’s the CPU and GPU coolers as well as the PSU playing into it. Speaking of dust, you want to make sure that your computer remains as dust free as possible. 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. Optimal air pressure with a computer case is one of the most discussed and debated topics in computer cooling. You want as close to a laminar flow as you can get, which just means as smooth and unobstructed as possible. Most cases are designed with a certain directional airflow in mind–usually front to back, and bottom to top. 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. A single exhaust fan with no intake fan is negative pressure. So my question is, should i flip the top fan to be an intake and leave the one on the back as an exhaust? Aim for slightly positive pressure, with slightly higher intake CFM than exhaust CFM. You will also be able to identify the Exhaust side as you will see power wires entering the fan motor. Neutral pressure – Air pressure in the case is equal to air pressure outside of the case. Or just make them both exhaust? 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. But once you have your optimal cooling path planned out, it’s all about […], […] PC Cooling: How to Set up Computer Case Fans […]. 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. How to determine the airflow direction of your case fans. Just be sure to actually clean the filters once in a blue moon. But the device introduced far too much impedance, especially at low speeds. Otherwise, you may end up with a toaster oven of a computer. In hindsight, using another method to represent air pressure would’ve been better. Detach and remove them if … I am getting my first self built PC and I am unsure of what direction of airflow should be in each vent. (I know homie answered already above, but this sitting here unanswered still bugged me.) Neutral would be when intake and exhaust CFM are equal. Different flow affects dust build up just as much as the case and house itself. This means I have positive pressure happening in my case. If you could explain the proper direction for each fan flow. 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. By changing the direction a fan is mounted, it can act as either an intake or exhaust. Determine where the PSU is intended to fit; this is typically at the bottom of the case in most modern chassis designs. If your case has vents at the top, they should be placed as exhaust fans because hot air will rise. A self-professed tech hipster that loves computers and music. Computer Fan Airflow direction? You should also heed the placement of the fans. It is an Akasa fan. 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? By changing the direction a fan is mounted, it can act as either an intake or exhaust. A single intake fan with no exhaust fan is positive pressure. Alternatively, you can plug the fan in and place a tissue on a side of the fan to determine the direction of air flow. 140mm PWM 120mm PWM 92mm PWM 80mm PWM 140mm PWM high-speed 120mm PWM high-speed. Should I add additional fans at the top of my case to help with proper air flow? Negative pressure – More air is being pulled out of the case than being pushed in, creating a vacuum. 4 years ago. Simplest way to check fan direction is to just plug it in and see which way the air flow is. When building your computer, be sure to configure your cooling system with the principles outlined above in mind. Large internal fan ducts, while a good idea on paper, are more likely to decrease overall thermal performance by obstructing primary air flow through the case. It is an ATX case, Mid size with PSU on bottom. Your negative pressure graphic is not likely as you would never exhaust out the front. 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. When mounting a computer case fan it's important to mount it in the right direction. Here's what you need to know about both types and which is better for your PC build. Question here, how can you find out the cfm rating of the stock fans that come with a computer case? NEWSLETTER. Otherwise, all the airflow in the world won’t help much to cool down your components. Lastly, the fan airflow can be identified by the arrow markings on the fan housing. We breakdown the best practices for making sure things don't overheat. 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. 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.. Every fan features a cubic feet per minute (CFM) rating, which measures of the volume of air it moves in a minute. Question about fan and airflow direction in my small build. Airflow Direction of CPU Fan This is all about my old Dell Dimension 4400's design. Noisy fans remedy – Install fan gaskets, use rubber pins instead. You can’t really control airflow at these points unless you want to put caulking or sealant in your case. Last edited by Executioner ; Mar 31, 2019 @ 9:01am Thanks for the feedback. the direction the fan spins. Please use this form to pose a question! I'm building a smaller computer for a family member and its an Antec P50 case. Airflow through the case is important, so yes, it matters. The only problem is i cant remember which way the rear case fan was facing. You’ll actually make it louder. Properly setting up your computer case fans is essential for efficient PC cooling. Just be sure to avoid those tacky LED-equipped case fans in the office. When looking at our fans, the Front or Intake side of the fan will always be the side that has the Cooler Master Logo in the center of the blades. EXPERIMENT #2: A FAN AIRFLOW BOX More details This morning i stripped the PC to clean out all the dust. Does this configuration compromise the intake cfm’s? How Best to Support Your Remote Workforce: COVID... Four Ways to Implement a Hygienic Return to... How To Maintain Clean Schools for a Safe... Could a Flexible Office be Right for Your... Business Guide to Proper E-Waste Disposal, RAID Basics: How Your Business Can Benefit, The Quiet Office: Turn Down the PC Noise - HardBoiled, Building A PC : 31 PC Building Mistakes to Avoid, PC Cooling: How to Set up Computer Case Fans, 5 Ways to Stream from PC to TV or Digital Display, Four Apps that Make Your Tablet a Second Monitor, 6 Reasons Your PC is Slow and How to Fix It, Born in the USA: Computer Hardware Made in America. 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. Thank you. One of the best spots on a machine is the top of the case. Please describe your reasoning for changing the airflow direction. Welcome to the official subreddit of the PC Master Race. 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. By leaving filters dirty or covered in dust, you reduce airflow and cooling power. Air should travel in clear path through the case. You will also be able to identify the Exhaust side as you will see power wires entering the fan motor. Generally, you want the case fans in front of the case drawing in air while the fans at the rear blow air out. In a perfect scenario, you’d have neutral pressure with an enclosed case because no dust would be sucked in. Static pressure fans are great for radiators and case meshes, and use resistance to push heat through your PC build. Source(s): computer fan airflow direction: https://shortly.im/4Qaoj. As for the pressure graphics, the arrows are supposed to represent pressure rather than airflow. 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. 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