Phisherman said:
I prefer to have all the fans blowing in. The airflow from several
fans will easily overcome any heat-induced rising air flow.
This is truly horrible advice. Your case will be very hot, and you'll have
virtuall no air flow.
Reasons:
1. This way, I don't end up with loads of dust and cat hair geting
sucked into every opening, such as USB ports, flash card connectors,
tape drive, etc.
Why use any fans at all? Just close up your machine tight, and you'll get
none of that pesky dust.
I haven't reversed my power supply fan because the two reversed case
fans move enough air to keep the case under positive pressure.
Then you don't have all your fans blowing in. Increasing the pressure in
your case (slightly) is not a bad thing at all. However, it depends on
where the two "reversed case fans" are. If you're saying you reversed 2
fans, that seems to imply that before, you had 3 fans (counting your power
supply fan) all blowing out. That's impossible on any system you went out
and bought, unless there's a defect in the system. If it's a system you
built yourself, then you just built it wrong to begin with.
In addition, if you now have a fan in the front bottom blowing in, and a fan
in the rear top under the power supply blowing in, this is also a bad
design, but not as bad as the others you described. You've got air blowing
in right underneath the air that's blowing out. You've got a lot of
circulating air that isn't circulating over any of your system components.
It's the equivalent of "going in one ear and out the other". It's mostly a
waste of air flow. You'd do much better closing off that hole and blowing
that fan in the bottom front, along with the other fan. This still gives
high pressure in your case, but gives *much* better air flow.
