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  1.    15 Mar 2017 #21
    Join Date : Nov 2013
    Houston
    Posts : 2,110
    3-Win-7Prox64 2-Win10Prox64

    Hi,
    In my case the flow is like this
    Attachment 125321

    In cdburn's case I'm suggesting the opposite which seems more balanced to me anyway
      My ComputersSystem Spec
  2.    15 Mar 2017 #22
    Join Date : Mar 2017
    Posts : 40
    Windows 10
    Thread Starter

    Quote Originally Posted by essenbe View Post
    Mike, maybe I don't understand exactly what you are saying, but you would be hurting yourself exhausting air out of the front and rear. The basic rule is to have the airflow running in 1 direction, in the overwhelming majority of cases, in the front and out the rear. That video demonstrates the number of gaps in the case and the flow of air. Even with the rear fan completely removed, it still flows pretty aggressively in the front and out the rear. So, maybe I don't understand you but I would never exhaust out the front. You would be creating a situation where air circulates within the case instead of exiting. Did I miss something?
    This was my thought process....I also thought many of the components would not receive proper airflow?
    Quote Originally Posted by ThrashZone View Post
    Hi,
    In my case the flow is like this
    Attachment 125321

    In cdburn's case I'm suggesting the opposite which seems more balanced to me anyway
    The only thing I am doing differently here is intaking from the top. No fan on bottom like you. Everything else is the same. You even have the rad in front where I do.
      My ComputerSystem Spec
  3.    15 Mar 2017 #23
    Join Date : Nov 2013
    Houston
    Posts : 2,110
    3-Win-7Prox64 2-Win10Prox64

    Hi,
    Exactly which I prefer the radiator as even Steve said as a intake and mine is
    Since we can not see the psu I was guessing it's fan was facing upwards and pulling air from inside the case
    According to you that is not the case it pulls air just like mine from the bottom and pushes air out the back.

    Personally I'd take that shroud off if possible unless you have another fan under it doing something ? intake or exhausting.
      My ComputersSystem Spec
  4.    15 Mar 2017 #24
    Join Date : Mar 2017
    Posts : 40
    Windows 10
    Thread Starter

    Quote Originally Posted by ThrashZone View Post
    Hi,
    Exactly which I prefer the radiator as even Steve said as a intake and mine is
    Since we can not see the psu I was guessing it's fan was facing upwards and pulling air from inside the case
    According to you that is not the case it pulls air just like mine from the bottom and pushes air out the back.

    Personally I'd take that shroud off if possible unless you have another fan under it doing something ? intake or exhausting.
    Yes, that is where I have my rad. I think it works best here for my setup. I love the shroud, hides all of my cabling and makes the case look really nice. What would be the benefit of removing the shroud? I have some new intake fans on the way per @essenbe suggestion that will help pull more cool air in through the front. After watching the video he shared I may end up just leaving everything as is as that is the exact airflow I am trying to achieve with this build. May have to play with speeds a bit on fans to achieve this but making my way there. Thanks for all the insight and sharing your build, it's very helpful as our setups are very similar.

    EDIT: There is a fan intaking on the bottom of the PSU with an air filter in front of it.
      My ComputerSystem Spec
  5.    15 Mar 2017 #25
    Join Date : Oct 2013
    NW Florida
    Posts : 9,486
    Windows 10 Enterprise and Pro/Windows 7 Enterprise/Linux Mint

    Here's another video that demonstrates positive/negative and neutral airflow. However, it is difficult to actually plan negative or neutral especially with drive cages in front because exactly how much air they can move through the cages is pretty much just a guess. Most of it gets blocked. But, anyway...

      My ComputersSystem Spec
  6.    15 Mar 2017 #26
    Join Date : Nov 2013
    Houston
    Posts : 2,110
    3-Win-7Prox64 2-Win10Prox64

    Hi,
    Yep all psu's will have a intake that will exhaust out the back yours is just out of sight

    If you have room under the shroud add a fan in there make it pull from which ever direction you want mine is obvious which way I prefer

    One thing from the demo Steve posted that is different on mine is all of the holes on the back of my case are clear taped up so no air goes out through them
    That was a little tip from LayBack Bear on SevenForums
    All air goes out the top

    P.S. I have No drive cages to block air flow
      My ComputersSystem Spec
  7.    15 Mar 2017 #27
    Join Date : Mar 2017
    Posts : 40
    Windows 10
    Thread Starter

    Quote Originally Posted by essenbe View Post
    Here's another video that demonstrates positive/negative and neutral airflow. However, it is difficult to actually plan negative or neutral especially with drive cages in front because exactly how much air they can move through the cages is pretty much just a guess. Most of it gets blocked. But, anyway...
    Thank you again for sharing vid. The only drive cage is below the radiator under the PSU shroud, airflow is well above this cage. There is still the air filter, fan mounting bracket and radiator impeding airflow but still probably not as much as drive cages.

    Quote Originally Posted by ThrashZone View Post
    Hi,
    Yep all psu's will have a intake that will exhaust out the back yours is just out of sight

    If you have room under the shroud add a fan in there make it pull from which ever direction you want mine is obvious which way I prefer

    One thing from the demo Steve posted that is different on mine is all of the holes on the back of my case are clear taped up so no air goes out through them
    That was a little tip from LayBack Bear on SevenForums
    All air goes out the top

    P.S. I have No drive cages to block air flow
    I might be able to fit a small fan in there....do you mean like pulling air under shroud from front to back or back to front? I think in this setup it'd be best to pull front to back? I may not have room anyway.

    I actually don't mind the airflow going through the holes in the back. What I think I need to worry more about (especially with intake fans on top) is blocking off the empty area on the radiator mount (being used for the 2 140mm fans, can fit 3 140mms, air from inside the case may make it's way up into the compartment where the fans draw in air from the top of case. I can take a picture of this to show you but similar idea to what you are doing. Forcing all air out the back and drawing only cool air from the top and front.

    As mentioned above the only drive cage is below PSU shroud and well below airflow from intake radiator fans in front.

    Thanks again for your help
      My ComputerSystem Spec
  8.    16 Mar 2017 #28
    Join Date : Mar 2017
    Posts : 40
    Windows 10
    Thread Starter

    Quote Originally Posted by essenbe View Post
    Here's another video that demonstrates positive/negative and neutral airflow. However, it is difficult to actually plan negative or neutral especially with drive cages in front because exactly how much air they can move through the cages is pretty much just a guess. Most of it gets blocked. But, anyway...

    What do you have your top and back fans running at? I know you said rad fans at 1800 or so and only turn them up if you are benchmarking, etc. but what about top and back? Thanks again for all your help!
      My ComputerSystem Spec
  9.    16 Mar 2017 #29
    Join Date : Oct 2013
    NW Florida
    Posts : 9,486
    Windows 10 Enterprise and Pro/Windows 7 Enterprise/Linux Mint

    I have these fans on my radiator Amazon.com: Noctua Fan with Focused Flow and SSO2 Bearing, Retail Cooling NF-F12 iPPC 3000 PWM: Computers & Accessories. As you said, I run them around 1900 most of the time. I have an open air case, and as such I only have 1 200mm fan which runs at 100% all the time. In a normal case, you are better off, IMO, running them as fast as possible. As always with fans, it is a trade off between airflow and noise. So, as high as you can run them at a noise level you are comfortable with. IMO, there is no such thing as too much airflow.
      My ComputersSystem Spec
  10.    16 Mar 2017 #30
    Join Date : Mar 2017
    Posts : 40
    Windows 10
    Thread Starter

    Quote Originally Posted by essenbe View Post
    I have these fans on my radiator Amazon.com: Noctua Fan with Focused Flow and SSO2 Bearing, Retail Cooling NF-F12 iPPC 3000 PWM: Computers & Accessories. As you said, I run them around 1900 most of the time. I have an open air case, and as such I only have 1 200mm fan which runs at 100% all the time. In a normal case, you are better off, IMO, running them as fast as possible. As always with fans, it is a trade off between airflow and noise. So, as high as you can run them at a noise level you are comfortable with. IMO, there is no such thing as too much airflow.
    Yeah I bought those same ones for my rad. They will be here tomorrow. I have 3 140mm Noctua NF-P14s 1500 redux-1500 RPM on the back but they are definitely not running at full speed...I'll see how high I can turn them before I get annoyed with the noise. Thanks as always.
      My ComputerSystem Spec

 
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