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Reversed the fan direction in my power supply...

post #1 of 7
Thread Starter 
Got sick of listening to the fan spool up after 10 minutes because it wasn't getting cooled enough (easily the loudest fan in my rig)...not getting cooled enough, because PS fans are designed to suck the heated chassis air in and help exhaust it...

So I turned the fan around, so it draws cool air in from outside the case, and then exhausts it inside. I made a baffle so that air doesn't go into the lower half of the case, but out the Armour's upper 80mm fan port...

Of course, my chassis temps might go up a bit because of this, but so far, it's reading about the same (CPU, MB, GPU), give or take a couple of degrees...
Quad H2O
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Quad H2O
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post #2 of 7
Interesting, I would've expected the system temps to rise.
Mighty-iTX
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Mighty-iTX
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post #3 of 7
Thread Starter 
Quote:
Originally Posted by grunion View Post
Interesting, I would've expected the system temps to rise.
I think the baffle really helps in this setup.
The PS fan exhaust directly at the left side cover (because the PS is tilted on it's side in the Armour case), not like normal PS mounts with the fan facing downwards...
So I baffled the bottom and right side of the fan opening, so basically the air has nowhere to go but out the 80mm case opening...

Also, when I eventually go water cooled, chassis temps will naturally drop, I assume...

When there is a large draw on the PS (gaming), it naturally heats up and the fan kicks in, but for normal desktop use, it's relatively silent now, where as before, it was very audible...
Quad H2O
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Quad H2O
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post #4 of 7
This is a risky idea. Some PSU components will no longer be as cool which may lead to PSU performance issues.
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Once again...
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post #5 of 7
Thread Starter 
I'll take the risk...
There is an element of risk in everything you mod or overclock, right?
Quad H2O
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Quad H2O
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post #6 of 7
Originally, the ATX specifications actually stated what you are doing; the power supply fan was to blow "inwards" to force air into the case where it would deliver air to where the processor and heat sink would be located, usually right underneath the power supply. Many power supplies at that time had slots on top of the cover that would be facing down towards the processor area when the power supply was installed.

Since this would guarantee a stream of warm air (heated by the power supply components) going into your case, many manufacturers choose to ignore the spec and kept going on with the old "exhaust fan" instead.
    
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post #7 of 7
Thread Starter 
I might try reversing it back now, as I've gone liquid cooled and the interior temps are a lot lower now...
Quad H2O
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2 X Maxtor 80Gb SATA Intel RAID Windows 7 X64 Build 7057 Acer 22" LCD (16:10) Dell RT7D50 
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OCZ 700Watt GameXStream SLI ThermalTake Armour Microsoft Intellipoint Trackball Optical 
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Quad H2O
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Intel Q6600 Quad Core G0 at 3.6Ghz Gigabyte GA-EP45-UD3R MSI NX8800U-E 8800 Ultra 4X1Gb OCZ FlexXLC 1150 
Hard DriveOSMonitorKeyboard
2 X Maxtor 80Gb SATA Intel RAID Windows 7 X64 Build 7057 Acer 22" LCD (16:10) Dell RT7D50 
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OCZ 700Watt GameXStream SLI ThermalTake Armour Microsoft Intellipoint Trackball Optical 
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