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Reverse Airflow...

post #1 of 6
Thread Starter 
Hello gentlemen,

I'm considering a rather big "upgrade" to my current rig, or rather, an entirely new rig stealing a few parts from my current one. My question regards the practicality of reversing the airflow in a case.

My computer sits next to my desk, below and a bit in front of my window mounted air conditioner. As summer is rapidly approaching, this AC unit will be blowing nearly non-stop. Since the cold air flows from above and behind my case, I'm considering: attaching the H70 so it pulls air in from the back and expels it into the case, as well as reversing the top mounted fans for intake. The front mounted fans would be upgraded for higher flow and reversed to push the air out.

Are there any particular dangers to this setup?
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First Build
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Phenom II x4 955 ASUS M4A88TD-V EVO MSI 560TI Twin Frozr II 4GB WINTEC AMPX 1333Mhz 
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250GB Seagate Barracuda Win 7 64 Thermaltake 850W HAF 912 
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post #2 of 6
actually no, as long as you have as much exhaust as you have intake youll have no issues

EDIT since your in a 912, id set the side panel slot exhaust too if you turn your top intake and h70 intake
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post #3 of 6
As long as you create an internal airflow path for air to exhaust cleanly you should be ok. Each rig I have built has required a different airflow path based on location and hardware used. On several rigs setting the top fan as intake resulted in nice temperature reductions and I wasn't even dealing with AC units smile.gif

Just make sure you make a plan for a good clean exhaust IMO
    
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post #4 of 6
Thread Starter 
Thanks for the replies, guys.

One of my concerns is that I planned on adding another 560ti to this rig, and I can sorta see the bottom card being left out of the airflow this way. Am I overthinking things? Given how cold (and often) the AC runs, I'm imagining some frosty temps in the case.
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Phenom II x4 955 ASUS M4A88TD-V EVO MSI 560TI Twin Frozr II 4GB WINTEC AMPX 1333Mhz 
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First Build
(13 items)
 
  
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Phenom II x4 955 ASUS M4A88TD-V EVO MSI 560TI Twin Frozr II 4GB WINTEC AMPX 1333Mhz 
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250GB Seagate Barracuda Win 7 64 Thermaltake 850W HAF 912 
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post #5 of 6
Quote:
Originally Posted by Vertigo79;13137314 
Thanks for the replies, guys.

One of my concerns is that I planned on adding another 560ti to this rig, and I can sorta see the bottom card being left out of the airflow this way. Am I overthinking things? Given how cold (and often) the AC runs, I'm imagining some frosty temps in the case.

Although it is usually optimal to match the amount of intake with exhaust - you can modify this to alleviate issues like that. Setup the side panel as exhaust you would still be having airflow circulation so it wouldn't be starved. Plus the 560 doesn't get too hot from what I hear.
    
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512gb Crucial M4 & 2x750GB WD Blacks in Raid 0 Lite-On iHAS424-98 Windows 7 Ultimate SP1 64-Bit Acer G24 24" 2ms@1920x1200 
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USB Keyboard SILVERSTONE ST1000-P 1000W Case Labs MH10 #1 Logitech Wireless 
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CPUMotherboardGraphicsRAM
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Hard DriveOptical DriveOSMonitor
512gb Crucial M4 & 2x750GB WD Blacks in Raid 0 Lite-On iHAS424-98 Windows 7 Ultimate SP1 64-Bit Acer G24 24" 2ms@1920x1200 
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post #6 of 6
How exactly do you match intake with outtake, like exactly?

I just raise and lower the speeds of my (7) case fans based on performance or if I want it to be quiet. I have push/pull as well on my heatsink so that probably sucks in a good bit (or exhausts it... im not sure). I see the temps drops or rise and I find what's acceptable.
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Sanyo DP19640 18.5" 768p KDS Rad-7xp 1024p CM Storm Quickfire Rapids Brown Rosewill Capstone 750 
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Build In Progress
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Haswell i7-4770K 4.8GHz@1.452v/1.97vRIN Gigabyte Z87X-UD3H Older Gigabyte 7950 (H60 Mod) 2x4GB Gskill 2400CL11 Hynix CFRs 
Hard DriveCoolingOSMonitor
Samsung 830 128gb Corsair H110 w/4x 140mm Yate Loon High Blues W7 x64 Ultimate Yarrgh Matey Dell U2312HM Matte IPS 1080p 
MonitorMonitorKeyboardPower
Sanyo DP19640 18.5" 768p KDS Rad-7xp 1024p CM Storm Quickfire Rapids Brown Rosewill Capstone 750 
CaseMouseMouse PadAudio
Bitfenix Shinobi Modded CM Storm Spawn Steelseries Diablo 3 2 set CD Speaker + Big Sub 
Other
Bitfenix Recon Fan Controller Moded 
CPUMotherboardGraphicsRAM
Delidded i7-3770K 5GHz@1.499 Gigabyte Z77X-UD5H 1.1 Sapphire Dual-X 7950 3L Boost 4x2GB Mushkin Ridgeback 2200mhz 8/11/8/27 1.75v... 
Hard DriveCoolingCoolingCooling
Intel X25-M 80GB SSD NH-D14 SE2011 Noctua 120/140/140 Fans 3 x Yate Loon Mediums (Petras) 2 x NZXT Havik 140mm Fans 
OSMonitorMonitorKeyboard
Hax'd W7 Ultimate 64-bit Sanyo DP19640 19'' KDS Radius Rad-7xp 17'' Ducky 1087 MX Brown 10keyless 
PowerCaseMouseMouse Pad
Rosewill Capstone 550w Modular NZXT Source 210 w/Modded Window Razer Deathadder 3.5G Steelseries Blizzcon D3 
AudioAudioOtherOther
Phillips FW-C250 2 Speaker Set w/3 CD Changer JBL Sub 6 Subwoofer NZXT Sleeved LED Strip 1m Blue NZXT Sentry 2 Fan Controller 
Other
Colonial Blue Paracord Sleeving 
CPUMotherboardGraphicsRAM
Phenom ii X4 955C2, $31, 5 broken pins, works! ... Biostar A770e3 6.3 Red&Black MSI GTX 460 768mb Twin Frozr II 2 x 2GB Kingston HyperX 1333 OC to 1348CL7@1.65v 
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Intel X25-M G2 80GB SSD NH-D14 SE2011 6 x Case Fans (4 x YL-M, NZXT case fan, CM Hype... Jerryrigged Chipset-Northbridge 80mm HSF 
CoolingOSMonitorKeyboard
Jerryrigged VRM Heatsink (sawed off stock AM2 h... Hax'd W7 Ultimate 64bit Sanyo DP19640 19"1360x768 Ducky Cherry Browns 10keyless 
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