Currently I have 3 fans on my Shuttle system. 2 on teh back and 1 on top. As of now all the fans suck air out of the case. I was thinking of having the top fan blow air onto the MB. Would this be better for cooling, or should I just leave it be?

I would say it's worth a shot, but I have not played around with SFF cases, they may have it configured that way for a reason.

Try it out and use Speed fan to mintor temps before and after (It has a nice charting tool) and post some screenshots!

Right now I have the case off. So only 2 fans are running. And I'm getting a case temp of 63. No apps running except IE.

More to come

most likely you want the top fan to blow out no matter what , due to the law of heat, it rises, the rear fans could be on intakewhich should add a good flow over the boarddepending on the setup, i dont know the shuttle cases very well, but im sure having the top fan on exhust shouldbe a best, does you PSU have a exhuast fan, with all the fans on exhaust setup could be sucking heat from the PSU into the case

OK, with the case back on the temp with no apps running 49C.

Big diff!!!

They say that heat gos up, and U think that a fan on the top of the case should suck hot air out, But a buddy of mine cut a hole on top of his case so that he could put a 120mm fan to suck hot air out, As it turns out the temp was 5C lower with the fan blowing cool air in then sucking hot air out....it made no since to me...We tested it with Speed Fan.

This is where experimenting comes into play...If you don't try you'll never know.

How about the back 2 fans blowing in and the top blowing out? You have the PSU pulling air out so it the pressure should be even. But sometimes possitive presure works better.

Quote: Originally Posted by HemiCuda1970 They say that heat gos up, and U think that a fan on the top of the case should suck hot air out, But a buddy of mine cut a hole on top of his case so that he could put a 120mm fan to suck hot air out, As it turns out the temp was 5C lower with the fan blowing cool air in then sucking hot air out....it made no since to me...We tested it with Speed Fan.

I agree. Hot air goes up, so let the top fan suck it out and maybe reverse one of the rear fans to blow in. If there right next to each other - you could set up a baffle or something so the air doesn't get directly sucked out through the exhaust

I remember when Joe over at ProCooling did this big long winded explanation of how air should move smoothly through a case. Low in front to high in back with the least obstuction all fans working in unison. He even set up a smoke test to show how smooth and even the air flow should be and how heat rises and this was the best way to do things.

It's a load of crapola.

What you want is turbulant air flow. I'm not saying restricted, but turbulent. Just like a waterblock with greater turbulence will allow water to pick up more heat on its way through a water block, the more air swirls around the more surface contact it will make and the more heat it will absorb before it leaves the case.

Since this is really hard to predict without running very complex simulations. Just flip your fans over and measure the difference. Keep flipping until you find the best combination of performance with all your fans together.

I just played LORTO Beta and the case was 54C with the top fan pulling the air out. BTW, the 2 back fans one is 2000 RPM and the other 4500, the top fan is 2500 rpm. Maybe i'll change them but omg the noise of teh 4500 is nutz.