fan direction

vicky953

vicky953

vicky953

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5 Apr 2013
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aberdeen
i currently have a 200mm fan in front of case attached to a phobya 200 rad in pull only config into the case, next i have a single 120mm fan exhausting out of the rear and a 240mm rad in the roof with 2 fans in pull exhausting out of the case.

what i would like to know is this the optimal setup of the fans.

reason im askin is in hwmonitor my v-core 1 temp hits 79 and v-core 2 hits 84 which seems a bit high.

in case anyones wondering im currently trying to overclock my fx8350 on a rev 1 sabertooth 990fx. cpu temp hits 61c bit idles at 41c
 
in at the front out at the back/top

its the only way to go

Vcore 1 and 2 temps are the motherboard temps on the z77 the sabertooth comes with additional fans is that the same on the 990? if so id add them when running rads
 
Have the rad at the top pulling air in as well as the front rad with the single fan exhausing at the back. Positive pressure > negative pressure (3 in, 1 out is better than 1 in, 3 out). Plus drawing room air over the top rad is preferable to case (hot) air.

I would imagine that would net you some improvements overall, not sure how much though.

@stuie: I saw an OcUK custom build with a similar config a while back and when I asked the opinion was that more ins than outs was preferable for rads to keep air moving through the case quicker.
 
Hmm ive got 2 in at the front and 3 out at the top wonder if its worth trying to fit an extra one in at the front
 
Possibly, or even having all 5 in and an out at the back?

The build in question was in an Elysium and IIRC it was a triple up top and a doublt at the front with a non-rad fan exhausting at the back. I'm going to have a poke around now and see if I can dig up the thread.
 
so basically turn my top 2 fans around so they are blowing the air thru top rad and leave the others as they are???

will this affect the case temps at all
 
Yep, I'm not 100% as I haven't tried both ways myself but as long as you have the exhaust running I shouldn't think your case temps will change much.

The idea is that you have more air being pushed in than pulled out as negative pressure means air is getting pulled in through any little gaps in the case (or open vents etc, whatever you have on your case) which leads to more dust sitting around etc and less air flow, more stagnation etc.

I found the thread here

The post with me asking about the fan setup is the second after the OP with rjkoneill putting in a response here
 
with watercooling, you want all rads on exhaust... you don't want to be sucking warm air over your rad and either keeping it in the case on the non-watercooled components and you definitely don't want to be pushing warm air over another rad or you are just sucking heat out of one rad and trying to put it back in the second

you could have all your rads on intake so that you get the coolest air over the rads, but then if you have any non-watercooled components in your case (like motherboard / memory etc.) then you'll be potentially upsetting them in the process
 
thats what im trying to figure out as i think its my vrms that are hitting the high 70s to low 80s which seems kinda high to me
 
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