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Fan shroud Heatsink -> Outake?

post #1 of 2
Thread Starter 
My current setup is:

Intake:
2 120mm front fans

Outtake:
1 120mm rear
1 80mm side (I would guess about ~40cfm compared to the ~60cfm 120s)

With a push/pull on an A70 in the middle of all this. The gap between the A70 pull and rear 120mm is about 1.5inches.

Do you think I would see any difference in placing the 120mm outtake as a top exhaust (Plan to cut a hole this weekend anyway), and just running a shroud from the A70 Pull to the rear grill?

Another idea I had to go along with this was setup the 80mm to blow vertically up through the A70 toward what would be the top exhaust, and place the a original A70 push as a rear exhaust between the video card and A70. (No extra PCI cards so it would sit above the PCIs.)

Or maybe it would make more sense to run a long shroud from a front intake directly to where the A70 Push is? Only concern is that if I want to minimize dust the CFM is very limited, but at least more concentrated on the heatsink.

I'm asking because due to the short distance between the rear 120 and the A70 pull it seems like it isn't adding anything at the moment.
Main
(16 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500K @ 4.5 1.31v load Gigabyte z68x-ud3h-b3 XFX HD6870 G.Skill RipjawX 2x4gb 1333 
Hard DriveHard DriveCoolingOS
WD Caviar Blue Samsung F4 Corsair A70 Windows 7 x64 
OSMonitorKeyboardPower
Lion OS 20'' Dell 21'' Samsung Logitech internet explorer Corsair VX450 
CaseMouseMouse Pad
Thermaltake M9 CM Storm Spawn SteelSeries QcK Mini 
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Reply
Main
(16 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500K @ 4.5 1.31v load Gigabyte z68x-ud3h-b3 XFX HD6870 G.Skill RipjawX 2x4gb 1333 
Hard DriveHard DriveCoolingOS
WD Caviar Blue Samsung F4 Corsair A70 Windows 7 x64 
OSMonitorKeyboardPower
Lion OS 20'' Dell 21'' Samsung Logitech internet explorer Corsair VX450 
CaseMouseMouse Pad
Thermaltake M9 CM Storm Spawn SteelSeries QcK Mini 
  hide details  
Reply
post #2 of 2
Personally I think positive pressure system is better, so I wouldn't add more exhaust fans in your scenario.

Here are some threads that should really help you make your decisions:
http://www.overclock.net/air-cooling/1041926-how-decide-case-air-cooling-warning.html


http://www.overclock.net/air-cooling/565007-guide-air-cooling-questions-answered-here.html


hope it helps.
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