Windows 7 Forums

Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: fans in or out?

14 Jul 2013   #1

XP windows Professional
fans in or out?

hi i have a question about case is the corsair carbide 400r. there are 2 x120mm intake fans in the front ( which come with the pc), 1x 120mm fan in the back. and then extra room for 2x 120mm or 140mm fans on the top. and space for 2x 120mm or 140mm fans on the side, and 1x on the base of the case. now obviously, the front fans are intake. and the back one is exhaust. but are the top, side and bottom fans intake or exhaust ? and i am running a high end graphics card. thank you

My System SpecsSystem Spec
14 Jul 2013   #2

Windows 7 Enterprise X64/Windows 10 Enterprise X64/Windows 10 Pro X64/Linux Mint

Much of that depends on you. There are basically 2 schools of thought. One is heat rises naturally so the top should be exhaust fans to get rig of the heat. But, in most cases this causes negative airflow which will draw in air (and dust) from the perforared rear panels and the extra pcie slots. The other school of thought, and my preference, is all fans are intake except the back fan. This causes positive air fkow and pushes out the hot air through the back with the dust along with it. There are several studies that show positive airflow reducse dust by up to 30%. In the end it matters what you want and what works best in your case. My case has all intake fans except the rear fan. It goes against typical practice, but it works well for me. My best suggestion is to try it a couple of ways and determine what works best for you and your case. What you want is the airflow to go front to back and fresh air for keeping your components cooler.
My System SpecsSystem Spec
14 Jul 2013   #3
Phone Man

Windows 8.1 Pro w/Media Center 64bit, Windows 7 HP 64bit

I have the same case and my bottom fan blows IN. My 2 side fans also blow IN. My rear fan has a CPU water cooler radiator and blows OUT and the 2 top fans blow OUT. I use a fan controller to adjust the fan speed for a positive pressure air flow and low noise.

My System SpecsSystem Spec

14 Jul 2013   #4

Win8/8.1,Win7-U64, Vista U64, uncounted Linux distor's

I have a HAF 922 with very similar fan setup. I have all fans in except the rear, it has two fans, push-pull on my radiator. The top fan is a 200mm and I tried it both in and out and I had cooler (3-4*) internal case temps with it moving air into the case.

I recommend using fan filters to keep dust to a absolute minimum. I use DEMCiflex filters and they are superb. SilverStone has a large selection of low cost filters. I have not used SilverStone filters but I have used other SilverStone products and can say the customer support is top notch.
My System SpecsSystem Spec
14 Jul 2013   #5

Microsoft Community Contributor Award Recipient

Windows 7 Ultimate 64

I have the same case and don't see the need for the side panel fans but mine is set up to intake bottom and front and exhaust rear and top through the rad and my temps even with a crazy OC are fantastic.
fans in or out?-hpim2604.jpg

fans in or out?-hpim2643.jpg

fans in or out?-hpim2639.jpg

fans in or out?-hpim2647.jpg

fans in or out?-hpim2651.jpg

My System SpecsSystem Spec
14 Jul 2013   #6

Windows 7 Professional x64 Service Pack 1

Front and bottom filtered, in, top and back unfiltered, out.

If you have your in fans spinning to fast, your gonna pull dust in from every open crack in your case.

I noticed with my air on, the dust is much less.
My System SpecsSystem Spec
14 Jul 2013   #7

Windows 10 Pro X64

I think essenbe said it spot on. Air flow is the important part. You will have to try different ways to see what is best for you. Like AddRam said, sometimes you have to try different ways, and play with the speeds.
My System SpecsSystem Spec
17 Jul 2013   #8

Windows 7 Professional 64bit SP1

The more fans you have blowing IN the case, the more positive air pressure you have and you are less likely to have dust settle in and on your components......provided you have dust filters on them. You do need at least 1 exhaust fan though. I know that case will handle a sack full of fans, but save some time and money and figure out what you need to keep your system cool and leave it at that. You don't need 15 fans in your case.
My System SpecsSystem Spec
17 Jul 2013   #9
Microsoft MVP

Windows 7 Ultimate X64 SP1

I go along with essenbe's plan too. I have 1 rear exhaust, 2 top, 1 front intake. My PSU is bottom mounted but draws air from the bottom and exhausts it and has little effect.
My System SpecsSystem Spec
17 Jul 2013   #10

Windows 7 Enterprise X64/Windows 10 Enterprise X64/Windows 10 Pro X64/Linux Mint

This may explain it better than I can.
My System SpecsSystem Spec

 fans in or out?

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar help and support threads
Thread Forum
fans on NB
what up guys? so the only component in my rig tht gets hot is the NB. and that's because my massive GPU is blocking any moving air to it. so how do u attach a fan to the NB? do u guys have pics? I have a nice fan to use, but yea still.
PC Custom Builds and Overclocking
hello sevenforums, was looking at getting this product Hotway 4-Bay non-RAID USB3.0/eSATA Enclosure 4-BAY ENCLOSURE anyway i was just having a look at replacement fans if i decided to change it but the measurements are 80 x 80 x 20 mm and most the 80 mm fans are 80 x 80 x 25 mm :S does...
PC Custom Builds and Overclocking
Help with my fans set up.
Hi folks, i need some advice on which way the fans should be within my new case. XIGMATEK Midgard PC Tower Case at cheap prices | PC World
Hardware & Devices
Hey Fans
I have got a pc tower which only has a fan up at the top and at the back????????? The psu is up near the top as well. My mates used to have the back set as intake and the top as exhaust and got better temps, i tried it and the temps are in the 38% and hwen i ran a couple of programs i ened up...
PC Custom Builds and Overclocking
help with fans
ok so i need input i have 4 fan connecters on my mother board CPU Fan - 4 pin Pwr Fan - 3 pin Sys Fan 1 - 3 pin - Un-used Sys Fan 2 - 4 pin its a gigabyte MB that comes with easytune which lets me keep CPU fan at 100% ok so this is the deal
PC Custom Builds and Overclocking
Help with fans.
Have alook at the case pictures, can you please tell me which way i should have all the fans.??????????? A 120mm can be installed a front, 2 x 120 mm on the side and 140mm maximum on top of case. The case is NZXT Beta Evo Black Metal Edition (BEVO-001BK)
Hardware & Devices

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 02:11.

Twitter Facebook Google+

Windows 7 Forums

Seven Forums Android App Seven Forums IOS App