Overclock.net › Forums › Cooling › Air Cooling › Intake/Exhaust ratio???
New Posts  All Forums:Forum Nav:

Intake/Exhaust ratio???

post #1 of 25
Thread Starter 
Help - i am busy modding my case and need to know the following...

Is it better to have more intake than exhaust or vice versa?

At my disposal, i have the following:

2 x 120mm fans (97cfm)
1 x 120mm fan (approx. 40-50cfm)
2 x 80mm fan (37cfm)
1 x 25cm sidefan (approx. 30cfm)

i also have a Zalman 9500 cpu cooler...

has anyone got some ideas or diagrams for the best airflow from a standard case?

thanks all...
RiG
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8500 @ 4ghz Asus P5Q Deluxe Zotac GTX275 AMP Edition 2 x 2GB OCZ Reapers (new HPC edition) 
Hard DriveOptical DriveOSMonitor
36GB Raptor & various others... Samsung Lightscribe Win7 Samsung 2494HS 
KeyboardPowerCaseMouse
G15 Antec Truepower 500W Antec P160 Cyber-snipa Stinger 
  hide details  
Reply
RiG
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8500 @ 4ghz Asus P5Q Deluxe Zotac GTX275 AMP Edition 2 x 2GB OCZ Reapers (new HPC edition) 
Hard DriveOptical DriveOSMonitor
36GB Raptor & various others... Samsung Lightscribe Win7 Samsung 2494HS 
KeyboardPowerCaseMouse
G15 Antec Truepower 500W Antec P160 Cyber-snipa Stinger 
  hide details  
Reply
post #2 of 25
Ideally you want the same inflow as outflow. If you case has fanless vents, you should have more inflow than outflow so you mitigate dust build-up.
BladeRunner v3.0
(11 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7-5930K @ 4.6GHz Core, 4.4GHz Cache ASUS X99 Sabertooth Sapphire R9 380 Dual-X OC G.Skill TridentZ 32GB DDR4 @ 13-15-13-33-1T 320... 
Hard DriveCoolingOSKeyboard
Samsung 850 Pro 512GB Noctua NH-D15S Windows 10 Home 64-bit Logitech G910 Orion Spark 
PowerCaseMouse
EVGA SuperNova 1000W T2 NZXT Phantom 820 Black Logitech G5 
  hide details  
Reply
BladeRunner v3.0
(11 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7-5930K @ 4.6GHz Core, 4.4GHz Cache ASUS X99 Sabertooth Sapphire R9 380 Dual-X OC G.Skill TridentZ 32GB DDR4 @ 13-15-13-33-1T 320... 
Hard DriveCoolingOSKeyboard
Samsung 850 Pro 512GB Noctua NH-D15S Windows 10 Home 64-bit Logitech G910 Orion Spark 
PowerCaseMouse
EVGA SuperNova 1000W T2 NZXT Phantom 820 Black Logitech G5 
  hide details  
Reply
post #3 of 25
I've always believed it's best to have a minor vaccum in ur case. IE more exhaust power/airflow than intake. You won't have hot air stagnet(or semi-stagnet) air in you case that way.
post #4 of 25
Quote:
Originally Posted by DesertRat View Post
I've always believed it's best to have a minor vaccum in ur case. IE more exhaust power/airflow than intake. You won't have hot air stagnet(or semi-stagnet) air in you case that way.
But you get more dust.
BladeRunner v3.0
(11 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7-5930K @ 4.6GHz Core, 4.4GHz Cache ASUS X99 Sabertooth Sapphire R9 380 Dual-X OC G.Skill TridentZ 32GB DDR4 @ 13-15-13-33-1T 320... 
Hard DriveCoolingOSKeyboard
Samsung 850 Pro 512GB Noctua NH-D15S Windows 10 Home 64-bit Logitech G910 Orion Spark 
PowerCaseMouse
EVGA SuperNova 1000W T2 NZXT Phantom 820 Black Logitech G5 
  hide details  
Reply
BladeRunner v3.0
(11 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7-5930K @ 4.6GHz Core, 4.4GHz Cache ASUS X99 Sabertooth Sapphire R9 380 Dual-X OC G.Skill TridentZ 32GB DDR4 @ 13-15-13-33-1T 320... 
Hard DriveCoolingOSKeyboard
Samsung 850 Pro 512GB Noctua NH-D15S Windows 10 Home 64-bit Logitech G910 Orion Spark 
PowerCaseMouse
EVGA SuperNova 1000W T2 NZXT Phantom 820 Black Logitech G5 
  hide details  
Reply
post #5 of 25
As far as optimal flow paths for the air, you want your motherboard to have the freshest air in my opinion, as that will ensure the lowest component temperatures possible. I have my case arranged so that I have an two separate airflow paths. One goes to the HDDs and PSU, while the other feeds the motherboard components.
BladeRunner v3.0
(11 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7-5930K @ 4.6GHz Core, 4.4GHz Cache ASUS X99 Sabertooth Sapphire R9 380 Dual-X OC G.Skill TridentZ 32GB DDR4 @ 13-15-13-33-1T 320... 
Hard DriveCoolingOSKeyboard
Samsung 850 Pro 512GB Noctua NH-D15S Windows 10 Home 64-bit Logitech G910 Orion Spark 
PowerCaseMouse
EVGA SuperNova 1000W T2 NZXT Phantom 820 Black Logitech G5 
  hide details  
Reply
BladeRunner v3.0
(11 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7-5930K @ 4.6GHz Core, 4.4GHz Cache ASUS X99 Sabertooth Sapphire R9 380 Dual-X OC G.Skill TridentZ 32GB DDR4 @ 13-15-13-33-1T 320... 
Hard DriveCoolingOSKeyboard
Samsung 850 Pro 512GB Noctua NH-D15S Windows 10 Home 64-bit Logitech G910 Orion Spark 
PowerCaseMouse
EVGA SuperNova 1000W T2 NZXT Phantom 820 Black Logitech G5 
  hide details  
Reply
post #6 of 25
Quote:
Originally Posted by stargate125645 View Post
But you get more dust.
so, you should clean out ur case of dust at least once a month in my opinion anyway.

I believe your right tho about the in=ou thing. optimally you want equal in and out flow but between the disruption of airflow by the internal compotents, etc. it'd be difficult to do that, wouldn't it?
post #7 of 25
i allways run more intake then outtake, it seems to work out good for me and it keeps the dust to a minimum
xeon
(13 items)
 
  
CPUMotherboardGraphicsRAM
W3520 x58 ud5 9800gtx+ tridents 
Hard DriveOSMonitorPower
wd black x2 W7 64 acer 23 ocz 850hx 
Case
haf932 
  hide details  
Reply
xeon
(13 items)
 
  
CPUMotherboardGraphicsRAM
W3520 x58 ud5 9800gtx+ tridents 
Hard DriveOSMonitorPower
wd black x2 W7 64 acer 23 ocz 850hx 
Case
haf932 
  hide details  
Reply
post #8 of 25
Yeah more intake , there are always loads of little holes other than exhaust fans for air to escape through
    
CPUMotherboardGraphicsRAM
Q6600/E6600/P4 515/Celery 352 ASUS P5K Premium Black Pearl PNY 8800GTX Gskill HZ 1000s D9GKX 
Hard DriveOptical DriveOSMonitor
2x WD Raptors 36gb Raid 0 Lite On Sata DVD-RW Custom XP Pro Dual 22" Westys WS 
KeyboardPowerCaseMouse
A4 Tech Slim Tagan 1100w U95 TurboJet Gigabyte 3D Aurora The Original G5 
Mouse Pad
Giant Rubber / Felt Pad (awesome) 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Q6600/E6600/P4 515/Celery 352 ASUS P5K Premium Black Pearl PNY 8800GTX Gskill HZ 1000s D9GKX 
Hard DriveOptical DriveOSMonitor
2x WD Raptors 36gb Raid 0 Lite On Sata DVD-RW Custom XP Pro Dual 22" Westys WS 
KeyboardPowerCaseMouse
A4 Tech Slim Tagan 1100w U95 TurboJet Gigabyte 3D Aurora The Original G5 
Mouse Pad
Giant Rubber / Felt Pad (awesome) 
  hide details  
Reply
post #9 of 25
Quote:
Originally Posted by DesertRat View Post
so, you should clean out ur case of dust at least once a month in my opinion anyway.

I believe your right tho about the in=ou thing. optimally you want equal in and out flow but between the disruption of airflow by the internal compotents, etc. it'd be difficult to do that, wouldn't it?
The number of components you have in your case has nothing to do with how much air goes in or out. Your airflow must be equal or mass accumulates inside your case, and your case subsequently explodes, which obviously doesn't happen.

Of course you should clean your case, but why make it worse than it has to be? I highly doubt your temperatures improve much, if at all, with excess outflow - optimal flow paths to get fresher air to the components are much more important. However, I have been wrong before so you should do some testing for us and let us know what you find out in terms of temperatures! I might have to change my thinking!
BladeRunner v3.0
(11 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7-5930K @ 4.6GHz Core, 4.4GHz Cache ASUS X99 Sabertooth Sapphire R9 380 Dual-X OC G.Skill TridentZ 32GB DDR4 @ 13-15-13-33-1T 320... 
Hard DriveCoolingOSKeyboard
Samsung 850 Pro 512GB Noctua NH-D15S Windows 10 Home 64-bit Logitech G910 Orion Spark 
PowerCaseMouse
EVGA SuperNova 1000W T2 NZXT Phantom 820 Black Logitech G5 
  hide details  
Reply
BladeRunner v3.0
(11 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7-5930K @ 4.6GHz Core, 4.4GHz Cache ASUS X99 Sabertooth Sapphire R9 380 Dual-X OC G.Skill TridentZ 32GB DDR4 @ 13-15-13-33-1T 320... 
Hard DriveCoolingOSKeyboard
Samsung 850 Pro 512GB Noctua NH-D15S Windows 10 Home 64-bit Logitech G910 Orion Spark 
PowerCaseMouse
EVGA SuperNova 1000W T2 NZXT Phantom 820 Black Logitech G5 
  hide details  
Reply
post #10 of 25
More intake then exhaust, but if the fan set up isn't correct then it doesn't matter how many fans you have

Edit:Right about the vents other places thats true but has to have a good path
    
CPUMotherboardGraphicsRAM
AMD FX-8320 3.6GHz 1.152v Gigabyte 990FXA-UD5 EVGA GTX 960 SSC 4GB 8GB G. Skill DDR3-1333 CL9 1.5v 
Hard DriveOptical DriveCoolingOS
WD 1TB SATA3 + 4TB Storage External USB Thermalright Archon Win 7 Pro x64 
MonitorKeyboardPowerCase
Samsung 27 inch LED 1920x1080 HD Logitech K120 Seasonic X-760 Modular Fractal Define R4 
MouseAudio
Logitech Altec Lansing 2.1 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
AMD FX-8320 3.6GHz 1.152v Gigabyte 990FXA-UD5 EVGA GTX 960 SSC 4GB 8GB G. Skill DDR3-1333 CL9 1.5v 
Hard DriveOptical DriveCoolingOS
WD 1TB SATA3 + 4TB Storage External USB Thermalright Archon Win 7 Pro x64 
MonitorKeyboardPowerCase
Samsung 27 inch LED 1920x1080 HD Logitech K120 Seasonic X-760 Modular Fractal Define R4 
MouseAudio
Logitech Altec Lansing 2.1 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Air Cooling
Overclock.net › Forums › Cooling › Air Cooling › Intake/Exhaust ratio???