Side Case Fan - Blow In or Blow Out?

Sammy5000

Senior member
Feb 25, 2003
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Alright yall. I am building a rig for a friend, and he has this old ass Powermax case that has two intake case in the front of the case, blowing cool air to the mobo, and one exhaust fan in the back of the case. Now, the PSU I am putting in will have an exhaust fan as well, but he also has a side panel with which to put a fan in. What should this fan be doing (exhaust or intake)? I was thinking intake, but that would be make three case fans blowing in, with one case fan and one PSU fan blowing out?

What you guys think on this side panel fan?
 

viivo

Diamond Member
May 4, 2002
3,345
32
91
Use it as an intake and remove one of the front fans. Or get MBM5 and test it with/without both front intakes and with it blowing and exhausting.
 

akira34

Golden Member
Jun 26, 2004
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I always have front and side fans as intake with top and rear fans venting out. Is there any room in the case to install another rear exhaust fan? How about moding the case to have a blow-hole in it?
 

Cheetah8799

Diamond Member
Apr 12, 2001
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The front fans on most cases I've seen don't allow as much airflow because of the whole plastic front of the case. So if I were you, I'd pull one of the front ones and put it in the side. Maybe even pull both front ones depending on what the mobo's temp sensors show when you test in various configurations.

With that many fans, you'll probably want to setup your friend with a fanbus as well.
 

akira34

Golden Member
Jun 26, 2004
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Originally posted by: Cheetah8799
The front fans on most cases I've seen don't allow as much airflow because of the whole plastic front of the case. So if I were you, I'd pull one of the front ones and put it in the side. Maybe even pull both front ones depending on what the mobo's temp sensors show when you test in various configurations.

With that many fans, you'll probably want to setup your friend with a fanbus as well.

All the cases I've seen, and used, over the past several years have had more than enough openings in the front to pull air in. The newer cases (for about the past two or so years now) have included filters that go over the intake fans to keep dust down. Even the cases that have what appears to be solid fronts have enough holes in them to pull air in. Typically, there's a major slot in the bottom of the case just behind the front. Then, where the fans go, is full of holes to allow that air to be sucked in. The cases from most makers for the past year have switched over to having more obvious openings in the front, but the older cases can still do the job. Essentially, if there's mounts in the front for fans, there's enough air coming in to feed them. If you have to alter the case to install front fans, chances are they won't do too much.

Make sure that any fans you put in either the side or top has a filter covering it. Otherwise, you'll be pulling in a lot of dust with that air. If there are any pets in the house, make damned sure there's a filter over the fan (either on the inside or outside of the case). If people smoke in the house, that goes double. With cig smoke, the dust will get caked on there and be a biatch to clean off.