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Old August 15, 2009, 03:50 PM
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Default please critique my server fan placement.....

i am running a home server in a coolermaster centurion 590 case.

the temps here on the east coast are retarded today so i installed some more fans.

on the front i have 2 Scythe Slip Stream Kaze Jyuni 120mm 68cfm fans blowing air IN

on the top (2), on the left side (1) and on the back (1) i have total four Scythe Ultra Kaze High Static Pressure 38mm 2000rpm 87.6 cfm fans blowing air OUT


so, 2 scythe jyuni's blowing in and 4 scythe ultra's blowing air out.

most of those grills the case came with on the front are off to allow more air in. just trying to cut down on the heat.

thx for critiques

rob123
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Old August 15, 2009, 04:03 PM
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I'd swap the top fans with the front fans.

Does no good having 4 87cfm out and only 2 68cfm in.
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Old August 15, 2009, 08:46 PM
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Should have more intake than out IMO. I'm a believer in positive pressure since getting my FT01. It makes sense really, use all the cracks and vents to allow the air to escape naturally rather than sucking air in from them, and just have mainly intake fans that are all filtered. Helps cut down on the dust too.
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Old August 16, 2009, 05:42 AM
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wouldnt positive pressure tend to keep heat inside the case?

rob123
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Old August 16, 2009, 06:08 AM
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Not exactly - ultimately, any air that enters a case needs to leave again, the faster the better. If the old air can't leave the case, it doesn't matter how many fans you have pushing new air in, and if new air can't enter the case, it doesn't matter how many fans you have trying to push the old air out. Too much positive or negative pressure is ultimately a bad thing - the best scenario is a close balance between the two. If the balance is skewed a little bit positive, all the air entering will enter through the intake fans, which makes it much easier to filter and keep the dust down inside.
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Old August 16, 2009, 06:49 AM
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Hi guys i work in HVAC,and when i do a hot room(apt furnace room),they always call for 10 to 20% more out take than intake.This is so there are no hot places,if the room was positive you could get a dead spot in a hard to reach spot as in a burner low in the corner,with negative that air has to move.Don't know if this is the same with comps as the size and there major air flow ,may not make hot spots.
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