[depthad]

alright i have 2x 50cfm sunons intake and 92mm tornado exhaust. but... when i put a piece of paper on my psu... it holds it there... the psu is an exhaust... any suggestions of how to fix this? im thinking about just replacing the psu fan w/ another 80mm 50cfm sunon. i dont think the 80mm tornado will fit in my psu. ill take it apart when i get home. but is there anything other then that i can do for under 15$

[Fire58Mech]

First of all what kind of psu do you have? read this http://www.ocforums.com/showthread.p...tec+psu+intake

also let me understnd this right, you put the 50cfm fans in your psu? or case?

BE HIGHLY CAREFUL WHEN TAKING ABART A PSU. the capisitors carry a lethal charge. best way to do this is to unplug it from the computer, Push the power switch a few times. then take it put and let it sit for atleast a day, a week is best.

under 15$ is easy, just make sure you got the fans turned the right way!

[mantrogo]

More to the point - what's the pressure in the case? Do you - by any chance - have more exhaust fans than intake fans? I suspect that beefing up the PSU fan could make your problem worse.

My guess is that your exhaust is already more than your air intake. What that means is that you're trying to shove out more air than is coming in - in other words you're trying to create a vacuum in there. Now you won't create a vacuum because (1) your case isn't airtight (2) if the negative pressure is severe enough then the air will flow in through the path of least resistance, which may even be reversing through a (weak) exhaust fan.

I had a similar experience. The 2 intake fans and the case exhaust fan are all thermistor controlled. The intake thermistors were always cooler than the exhaust thermistor and I was generating negative pressure such that air was flowing IN through my VGA Silencer exhaust .

Low pressure is bad - cooling in forced convection has a relation to the density of the cooling fluid - in our case air.

My load temps dropped when I reduced the rpms of the rear exhaust fan to the point that I was no longer seeing inflow of air through the Silencer - in other words pressure was give or take equalised.

[depthad]

alright, heres my set up sorry i didnt clearify:
2x 50cfm sunons intake (front of comp)
1x 115cfm tornado exaust (back)
stock raidmaxx pos exhaust (80mm prolly less then 30cfm)
when i turn down my tornado it no longer sucks through the psu but it increases temps. i know i have (-) pressure but i don't know if this could be fixed and help my temps.

when im painting my case black ill add a 92mm blowhole over the cpu and probley a 80 over my pci slots.