All fans point in.

PGdude

PGdude

PGdude

Soldato
Joined
3 Aug 2007
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Was this a bad idea in my Antec 300? I have the 140 on top, 120 at back, and two Xilence Red Wings at the front, all sucking air into the case (Positive pressure, is it called?)

Q6600 G0 2.4GHz
VID: 1.3250v

At 100% Load (Prime95, 4 threads, Small FFTs) it is getting to Max temps of:

0: 42
1: 39
2: 38
3: 42

Is all in a good idea, and do these temps look alright? I guess this has some overclocknig headroom to hit, but I'd like to get the best cooling configuration. It does making a whirring/whining noise. I'll isolate this later, but the Tuniq Tower is about a centimetre shy of kissing the 140mm fan on the top. TT is blowing towards the front. PSU is up to draw air out.
 
To get the best airflow (which gives you optimal cooling), you will want to balance the intakes and exhausts as much as possible. If you have all fans as intake then you trap a lot of hot air in the case - which will make your components hotter.

I suggest having the two Xilences intaking and the top and rear fans exhausting.
 
Positive pressure just means that there is more air coming in than going out, ie more CFM as intakes than CFM as exhaust, but it's generally never a good idea to have every fan as intake as, like andi has just said, there is nowhere for your hot air to go except to circulate inside the case.

Stress test for 24 hours and you'll probably see temps rise above what you stated in the op, as there is no exhaust in place.

(Personally, I am an advocate of negative pressure, but whatever works for you.)
 
Last edited:
Okay, that helped. There is an empty fan mesh on teh side of the case but that's probably not useful.

Will I be fine flipping the back fans around? Also how should I point the TT airflow?
 
Keep your two front ones as intake, and make your top and back as exhaust. This is the general set up of fans.
 
The only significant benefit of positive pressure is to help protect against dust entering your machine. Weigh this against the major issue of having extremely poor airflow with your current fan setup, and it's just not worth it tbh.

Have the top and back exhausting, and the front two pulling in. Set your TT so that the fan is pushing air through it, and out towards the back of your case (where I am assuming from your earlier post that the rear exhaust fan is positioned).
 
Positive pressure cooling can work really well, especially to get to those hard to cool areas e.g between graphics cards.

In most cases there are plenty of holes for air to escape as they are not air tight.

The PSU is always best venting air out of the case, unless it is fan less.
 
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