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Help with Airflow For 900D

post #1 of 8
Thread Starter 
Hi all, in my professionally illustrated 900D airflow, i seek advice to better the temperatures. Thanks for any input. The blue arrows represent cool air or so i think it will be and the red ones hot air.



post #2 of 8
How many CFM is the total for all the intakes?
How many CFM is the total for all the exhausts?
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CPUMotherboardGraphicsRAM
FX6300 Black M5A99X EVO R2.0 Nvidia GTS450 Team Vulcan PC3 12800 
Hard DriveOptical DriveCoolingOS
Samsung 840 PRO Asus DRW-1608P (x2) Custom Water Cooling Win7 (Ult), Win 8.1 & Win Server 2012 R2 
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2 X Samsung 915N Ducky Shine III, Blue Cherry/Blue LEDs PCP&C 1kw Lian Li PC-71 (W/Window) 
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My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
FX6300 Black M5A99X EVO R2.0 Nvidia GTS450 Team Vulcan PC3 12800 
Hard DriveOptical DriveCoolingOS
Samsung 840 PRO Asus DRW-1608P (x2) Custom Water Cooling Win7 (Ult), Win 8.1 & Win Server 2012 R2 
MonitorKeyboardPowerCase
2 X Samsung 915N Ducky Shine III, Blue Cherry/Blue LEDs PCP&C 1kw Lian Li PC-71 (W/Window) 
MouseAudio
Logiteck G400s none 
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post #3 of 8
At first glance it looks like you have too much exhaust (this could cause dust buildup faster), but like billbartuska stated above, the CFM in and out are the key numbers.

If you are getting high temps on your motherboard, you may need suplimental cooling on the VRM as you are using a water cooler that does not blow incidental air onto the mosfets like the stock CPU cooler does. It could be as simple as turning the rear AF 140mm exhaust fan around and making it an intake, perhaps even put a cowl on it to direct some air down at the VRM.
Jarvis
(26 items)
 
Pepto Pony
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MrDVR
(15 items)
 
CPUMotherboardGraphicsRAM
AMD FX-8350 @ 4.8Ghz CROSSHAIR V FORMULA-Z MSI GTX 980 Gaming 4g 16Gb G. Skill Ripjaws 4x4 @ 1600 
Hard DriveHard DriveHard DriveOptical Drive
Samsung 840 PRO 128Gb SSD Intel 160 Gb SSD Intel 250 Gb SSD Generic DVD-RW 
CoolingCoolingCoolingCooling
2 x Noctua (NF-P12-1300 )1300rpm Premium Silent... Alphacool NexXxos UT60 Full Copper Radiator 240 Noctua NF-A6X25 FLX Quiet Computer Cooling Fan ... NZXT Sentry Mesh Fan Controller w/ Five 30 watt... 
CoolingCoolingCoolingCooling
2 x Corsair Air Series SP120   COUGAR CF-V12H Vortex Hydro-Dynamic-Bearing  Monsoon 90° Rotary Angle Fitting - 5/8" - Red Bitspower Dual / Single D5 Top Upgrade Kit 100 ... 
CoolingCoolingCoolingCooling
ModMyToys DreamFlex Premium 3/8" ID Tubing Reta... Coolance Liquid Coolant Bottle, 700mL Fluoresce... Coolance PMP 450 Variable Speed D5 Pump Bitspower D5 Mod Top V2 Pom version 
OSMonitorKeyboardPower
Microsoft Windows 7 Ultimate Samsung KS8000 4k UHD 65" Microsoft Wireless Comfort 5000 Keyboard and Mouse SeaSonic M12II 750 
CaseAudio
My TV Stand Cabinet Creative Sound Blaster X-Fi Titanium 
CPUMotherboardGraphicsRAM
FX-4300 Gigabyte GA-78LMT-USB3 EVGA Geforce GTX 260 G.Skill Ripjaws X 
Hard DriveHard DriveOptical DriveCooling
Corsair SSD Samsung 7200 Laptop drive Some DVD Burner I took out of a dead Dell. Noctua NH-C12P SE14 
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Dell 19" 16:9 Logitec wireless Enermax 650w Apevia X-Cruiser3 Pink 
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A6-6400K Dual Core MSI A78M-E35 Onboard 4Gb G.Skill Ripjaws 1600Mhz (2 x 2) 
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Intel 320 SSD Western Digital 2.5" 1Tb 7200rpm  LG External Blue-ray Combo Drive Noctual NH-L9a 92mm SS02 
OSMonitorKeyboardPower
Windows 7 Ultimate 64bit Toshiba Regza 52" 1080p Logitech K400 Antec EarthWatts Green EA-380D 
CaseAudioOther
A piece of plywood and some zip ties. Onboard Hauppauge WinTV HVR-2250 dual tuner card. 
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Jarvis
(26 items)
 
Pepto Pony
(12 items)
 
MrDVR
(15 items)
 
CPUMotherboardGraphicsRAM
AMD FX-8350 @ 4.8Ghz CROSSHAIR V FORMULA-Z MSI GTX 980 Gaming 4g 16Gb G. Skill Ripjaws 4x4 @ 1600 
Hard DriveHard DriveHard DriveOptical Drive
Samsung 840 PRO 128Gb SSD Intel 160 Gb SSD Intel 250 Gb SSD Generic DVD-RW 
CoolingCoolingCoolingCooling
2 x Noctua (NF-P12-1300 )1300rpm Premium Silent... Alphacool NexXxos UT60 Full Copper Radiator 240 Noctua NF-A6X25 FLX Quiet Computer Cooling Fan ... NZXT Sentry Mesh Fan Controller w/ Five 30 watt... 
CoolingCoolingCoolingCooling
2 x Corsair Air Series SP120   COUGAR CF-V12H Vortex Hydro-Dynamic-Bearing  Monsoon 90° Rotary Angle Fitting - 5/8" - Red Bitspower Dual / Single D5 Top Upgrade Kit 100 ... 
CoolingCoolingCoolingCooling
ModMyToys DreamFlex Premium 3/8" ID Tubing Reta... Coolance Liquid Coolant Bottle, 700mL Fluoresce... Coolance PMP 450 Variable Speed D5 Pump Bitspower D5 Mod Top V2 Pom version 
OSMonitorKeyboardPower
Microsoft Windows 7 Ultimate Samsung KS8000 4k UHD 65" Microsoft Wireless Comfort 5000 Keyboard and Mouse SeaSonic M12II 750 
CaseAudio
My TV Stand Cabinet Creative Sound Blaster X-Fi Titanium 
CPUMotherboardGraphicsRAM
FX-4300 Gigabyte GA-78LMT-USB3 EVGA Geforce GTX 260 G.Skill Ripjaws X 
Hard DriveHard DriveOptical DriveCooling
Corsair SSD Samsung 7200 Laptop drive Some DVD Burner I took out of a dead Dell. Noctua NH-C12P SE14 
MonitorKeyboardPowerCase
Dell 19" 16:9 Logitec wireless Enermax 650w Apevia X-Cruiser3 Pink 
CPUMotherboardGraphicsRAM
A6-6400K Dual Core MSI A78M-E35 Onboard 4Gb G.Skill Ripjaws 1600Mhz (2 x 2) 
Hard DriveHard DriveOptical DriveCooling
Intel 320 SSD Western Digital 2.5" 1Tb 7200rpm  LG External Blue-ray Combo Drive Noctual NH-L9a 92mm SS02 
OSMonitorKeyboardPower
Windows 7 Ultimate 64bit Toshiba Regza 52" 1080p Logitech K400 Antec EarthWatts Green EA-380D 
CaseAudioOther
A piece of plywood and some zip ties. Onboard Hauppauge WinTV HVR-2250 dual tuner card. 
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post #4 of 8
Quote:
Originally Posted by billbartuska View Post

How many CFM is the total for all the intakes?
How many CFM is the total for all the exhausts?

he listed the fans he is using in the illustration...

personally i'd change the 2 fans behind the HDD cage with AF instead of SP. the static pressure isn't needed that much since there is less airflow resistance there then the intake fans which has to overcome air filter resistance.

I would also remove the rear AF140 since you already have exhaust going out the roof. there is no reason to have an exhaust fan in that location considering the proximity of the exhaust airflow of the H100i

overall you have 3 SP 120's as intake and 2 SP 120s as exhaust. i suppose it's not too bad. just a hair shy on the intake part but not enough to generate too much dust.
post #5 of 8
What Psyclum said. thumb.gif
post #6 of 8
Thread Starter 
What if i make the H100i Pull cool air in the case instead of pushing out? My room is always 23 - 25 celcius cause of the air condition. Thanks for the advice tho!
post #7 of 8
the 900D has an air filter on the roof, so making it into an intake is not a bad idea. the only caveat is you do NOT want to put the case in a "semi enclosed" area like under a desk where warm/hot air would be trapped under the desktop and get sucked right back into the case by the roof intake. if you intend to use the roof as intake, i would strongly recommend you have at least 1 foot of clearance behind the machine where the PSU/GPU exhaust would have sufficient room to mix with ambient air and do NOT have any obstructions above the case where warm air coming up from the PSU/GPU can have a chance of being sucked back into the case

IF you make the roof an intake, then you would want that AF140 exhaust fan there because you would essentially have 5 SP 120 as intake. you don't have to, since there are plenty of leakage points in the 900D for the pressure to work its way out, but since you have the fan there anyway, might as well use it if it's not causing a negative pressure situation.
post #8 of 8
Thread Starter 
Thanks alot bro.
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