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front to back cooling..why? - Page 2

post #11 of 35
Ive seen people do this with there lancool K62's... in fact i did it for giggles but it actually helped O.o

edit:... ok.. this ocn error thing is getting on my nerves...
post #12 of 35
Quote:
Originally Posted by airbozo View Post
In the diagram you have, the hot air from the GPU would be drawn in by the fan near the CPU collectively raising your temps.
This^

Edit: someone beat me to it :-(
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post #13 of 35
The rear intake fan will pull the air from the front of the case, moving the cool air along.

Also, heat rises, and having an intake on the back will just re-introduce hot air from the GPU (see drawing above)
post #14 of 35
To answer the question of why have the intake on the front, most people stick their computer under a desk and the back is usually within several inches of a wall or the back of the desk. The hot Air from the video card pours out and if your intake is the back or top, you are likely sucking in trapped warmer air heated by the gpu exhaust. If you are using an H50 or the sorts, the performance heavily depends on the ambient air temps.

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post #15 of 35
Quote:
Originally Posted by blupupher View Post
Because in reality it would look like this:
I agree. Unless u make an internal air tunnel like what dell btx platform was designed for, the air would just circling around in ur case
    
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post #16 of 35
I use my rear fan as exhaust. A huge part of that is due to the heat from the GPU's. I don't want all of that coming back in and blowing directly on my CPU Heatsink.

I currently have one intake fan at the lower front, two side intake fans (Blowing on GPU's and CPU), one rear exhaust and two top exhaust. The PSU pulls from the bottom of the cause, there is nearly a half inch of clearance from the floor. I also run a push/pull on the HSF.

The GPU's are reference, so all hot air is pushed out the back...like a fart.

The system works really well. Everything keeps nice and cool.
Edited by Biscuits_N_Gravy - 10/25/11 at 9:04am
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post #17 of 35
Quote:
Originally Posted by blupupher View Post
Because in reality it would look like this:
This. I can't help but laugh when people draw nice neat little arrows to indicate airflow. As if air flows perfectly straight and orderly like that.

Unless you have an "air penetrator" fan from silverstone or a grill that is designed to straighten the airflow it's not going to be straight.

Here is a demonstration.

    
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post #18 of 35
Quote:
Originally Posted by robwadeson View Post
I agree. Unless u make an internal air tunnel like what dell btx platform was designed for, the air would just circling around in ur case
well in all due reality, what if hes watercooling his gpus? lol
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post #19 of 35
Quote:
Originally Posted by robwadeson View Post
I agree. Unless u make an internal air tunnel like what dell btx platform was designed for, the air would just circling around in ur case
well in all due reality, what if hes watercooling his gpus? lol

EDIT: fail forum error.
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post #20 of 35
Thread Starter 
Quote:
Originally Posted by blupupher View Post
Because in reality it would look like this:
LOL and I thought I had paint skills

Points taken, it's just had me thinking for a while about why air is left to travel from the front/bottom to the back/top where it will heat up in the process
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