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Where and how to place case cooling fans?

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November 6, 2011 9:24:39 AM

Hi all,

I keep having 2 hot temp readings of sometimes over 110°C according to CPUID.

I was thinking that I might have wrongly installed the colling fans.

I have 4 "side of the case fans" and 1 bigger fan on the back.

ATM the big fan in the back is removing air from the case.
I have 1 on top of the GPU that is blowing air in and one below that on top of the GPU blowing air in.

Then I have 2 fans on the other side of removing air near the HD bay's.
If it isn't clear this way I don't mind making some pics with arrows on the coolers.

Any help to imrove this is welcome...thank you.
a c 197 K Overclocking
November 6, 2011 9:55:39 AM

Basic rule of fan placement:
Front and side - intake, and
Back and top - exhaust.

Side fans may help or hinder airflow through the case. Try with and without a side fan and use whichever gives you the better temps.

At the same time, make sure that the CPU cooler is properly installed, particularly if you are using a cooler with push pins.
a c 190 K Overclocking
November 6, 2011 9:55:50 AM

Your front fans should be pulling air into the case along with the sidefans,
the rear and any top fans should be exhausting from the case
but a pic is always handy if you have the time man :) 
Moto
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November 6, 2011 9:58:03 AM

I'll get on the pics ;) 

In this case it would mean that I'd have 4 fans blowing air in and only 1 taking the air out? Will it be able to pull all the air out from 4 fans?
a c 190 K Overclocking
November 6, 2011 10:01:21 AM

Yup, pressure will always try to equalise itself in nature,
ever heard the phrase 'Nature abhors a vacuum'?
any 'extra' air in there will find a way out
Moto
November 6, 2011 10:02:13 AM

At 110 you processor is not going to last very long, you urgently need to sort this out. You didn't say if the temperatures were full load or idle temperatures.

The fans on the case need to be set in the following directions, the front fan should blow into the case, the side fans should blow into the case, the bottom fans should blow into the case, the back fans should blow out of the case and the top fans should blow out of the case.

As you have such high temperatures I suspect that the heatsink is not mounted correctly or incorrectly applied heatsink compound. You should remove the heatsink and check.

It may be that CPUID is reporting the wrong temperatures or reporting in Fahrenheit instead of Centigrade, you should check the temperatures in the BIOS to be sure.

November 6, 2011 10:13:23 AM

well that is the strange thing.
My actualy core and CPU readings are fine...they don't go over 70°C.
But CPUID has 3 "extra" temps it meassures defined as TEMPIN0 to..TEMPIN2 and it is 0 and 2 that go over 100°C on full load.
November 6, 2011 10:14:58 AM

not allowed to edit for some reason so..
They are all in °C...checked.
November 6, 2011 10:24:52 AM

here is the UI from the program to give you and idea.
I took this after I has reset the min and max temps so the readings now are at idle.


hope this pic works :) 
a c 190 K Overclocking
November 6, 2011 10:27:02 AM

**Edit, your pic isn't working, try a direct link maybe**

Could be North/southbridge sensors,
are you on standard cooler? and what are your ambient (room) temps?
Moto
November 6, 2011 10:30:27 AM

Yeah the stock cooler
I have a new cooler on the way...should arrive tomorow I hope.
Thermalright silver arrow.
Room temps here are about 19-21°C
November 6, 2011 10:40:22 AM

Quote:
well that is the strange thing.
My actualy core and CPU readings are fine...they don't go over 70°C.
But CPUID has 3 "extra" temps it meassures defined as TEMPIN0 to..TEMPIN2 and it is 0 and 2 that go over 100°C on full load.


The temperatures may be the northbridge chip that is getting hot, it is common to have to fit a fan to this chip if the air from the CPU heatsink is not blowing over it. They sell fans specifically for this purpose in computer hardware stores. Try touching this chip, if you can't leave your fingers on it then you need a fan for it.





Quote:
My actualy core and CPU readings are fine...they don't go over 70°C



70 is still to high at full load, I don't like my CPU temperatures to be over 60 at full load on a hot day.

a c 190 K Overclocking
November 6, 2011 10:42:59 AM

Room temps are great, so going by that cpu-z shot, your cores are 9-10'c over ambient at idle?
Thats no problem then lol,
you should see a good decrease in load temps once that Arrows on there and settled too
Moto
November 6, 2011 10:47:51 AM

It isn't the cores that is the problem...there are 2 other temperatures that go over 100.
As mentioned above by pjmelect it my be the north and south bridge.
I'll turn 2 fans so they also blow into the case, and see if I can solve the issue that pjmelect just pointed me to.
Also gonna install fanspeed and see if I can get more control over my fans.
a c 190 K Overclocking
November 6, 2011 10:49:59 AM

It was actually me that mentioned Nb/Sb first hehe but yes, a fan on the Nb heatsink (or at least blowing onto it) would help bring it down
Let us know how it goes man
Moto
November 6, 2011 10:52:03 AM

aargh...reading manuals...looking for coolers...getting pics ready to post anyway...sorry man :) 
November 6, 2011 11:30:46 AM

Now this is gonna make me like look an even bigger newbie but...on my MOBO....what is the northbridge pls? Can't find it on the layout in the manual *blush and hides
Z68X-UD3H-B3
a c 190 K Overclocking
November 6, 2011 12:17:17 PM

Its the chipset beneath that cool bit of metal next to your Cpu, between that and the I/o part at the rear
it deals with the Cpu talking to other parts of the mobo mostly
Moto
November 6, 2011 12:54:55 PM

thx moto..so the one that has Z68 written on top.
Now I'll need to find a decent cooling unit.
Wondering how it will connect too since there are no holes or anything near to attach it? Next challenge :) 
All fans have been installed now as discussed above...no change in any of the temps atm.

I did install fanspeed and it seems it is a better control..and it also seems that the temps are short peak temperatures as I can never catch it being that high.
I can only see at CPU-Z's max temp reading that it did get that high at one point.
Anonymous
a b K Overclocking
November 6, 2011 2:20:24 PM

Motopsychojdn said:
Its the chipset beneath that cool bit of metal next to your Cpu, between that and the I/o part at the rear
it deals with the Cpu talking to other parts of the mobo mostly
Moto


Gah jesus... Really? Sorry for hi-jacking but if thats the northbridge what is the funky piece of metal by the pcie slots!?!? O.o

All this time... T.T
November 6, 2011 3:08:30 PM

OK I tried something as a temporary solution.
Apparently the GFX card is blocking airflow to the cooling ribs of the chipset.
I took one of the casefans and placed it inside the case under an angle so it blows air directly on the heatsink. And in a way it also helps with airflow towards the GFX card intakes. If this works and keeps things cooler I'll try and find a better solution for it.
Also gonna add a third intake cooler on the right side pannel so all those slots are filled and I have maimum fresh air into the case.

edit... temperatures have indeed decreased dramatically it seems. Now not going over 55-58°C for the chipset (north-southbridge), for some reason my GPU, CPU and it's seperate core temperatures have decreased as well.
The problem is that the GFX card is blocking the airflow to the chipset's passive cooler creating a warm spot under the GFX card, due to the fact that no fresh air can reach there. Now I'm gonna see if I can, in some way put direct outside air on the passive cooler... next challenge :) 
a c 190 K Overclocking
November 6, 2011 5:40:15 PM

Quote:
Gah jesus... Really? Sorry for hi-jacking but if thats the northbridge what is the funky piece of metal by the pcie slots!?!? O.o

All this time... T.T


The one directly beneath the ram? that there be the southbridge :p 
Moto
November 6, 2011 6:59:59 PM

might explain why I just checked the temp prog and there is still one peaking towards 105°C.

Gonna need a cooler on that other one was well.
Checking dimensions and ordering one as soon as I have my silver arrow from thermaltake... :) 

kinda weird that they put passive cooling on the south bridge but not on the north bridge...thought that they could us one default.
November 7, 2011 7:58:17 AM

I just got the thermaltake silver arrow..... WOW :ouch:  :pt1cable: 

THAT THING IS BIIIIIIGGG...don't even think I can still close my PC.... gonna be a close one :heink: 
a c 190 K Overclocking
November 7, 2011 3:59:09 PM

Maybe a bit of case-modding is in order hehe :p 
Moto
November 7, 2011 4:37:48 PM

well it was kindof simple.
I had to remove the two fans on the left casedoor.
With them mounted I couldn't close the casedoor due to the silver arrow's height.
So I now have 3 in the right sideplate towards the front of the case, which blow in the HD space. There is only 1 HD in the middle.
The exhaustholes that were in the doorplate opposit of those 3 are taped off. This lets the fresh air bounce off it and spread in the case itself.
Here it get's picked up on the bottom by the cooler aimed at the intakes of the GPU coolers and the southbridge.
And it get's picked up by the CPU fans from the silver arrow.

I left the old intake holes (where I had to remove the doorfans) in the left casedoor open as an exhuast to get rid of the pressure.
Been thinking about closing those too though...might give it a shot and monitor any temperature changes.
a c 190 K Overclocking
November 7, 2011 5:10:05 PM

Always worth monitoring the changes, check temps as is,
then seal up and recheck, I'd hazard the sealed way will be more efficient though :) 
Moto
!