Added more case fans now CPU hotter WTF!

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Meaning_Raptor

Meaning_Raptor

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Nov 19, 2014
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ok so here's my situation. I have a i5 4690k that I decided to overclock. I ordered a cryorig h7 with my money I worked for. Then a couple days later I ordered 5 case fans (to replace the one stock fan that came with my case. Two of the fans were 140mm and three of them were 120mm) with my report card money. I got the cryorig h7 CPU cooler first and I installed it. Worked awsome. Temps never went above 50c in BF4, the most CPU intensive game I have. Since temps were so low, I decided to go ahead and start overclocking it without the extra case fans. I have it overclocked to 4.5Ghz. Temps only rose a little bit the highest I saw it go was about 55c playing BF4. When I finally got my case fans, I installed all of them. I will tell this part in detail because I don't know what's causing the higher temps. I installed the fans then went to put the CPU cooler back on. Now that is a pain in the ass to put back on because I have to line up the CPU cooler's metal things to the screws inside the case. If anyone has ever installed the cooler I'm talking about in your case at the very top of it, (because that's where my mobo put my CPU socket) then you will know how much of a pain in the ass it is. I had about 3 failed attempts. One was I couldn't get the cooler lined up with the screws. I took it off, wiped off the newly put thermal paste I had put on, and tried again. This time I finally got it but when I turned my PC on I saw that the cooler wasn't spinnning. I was like oh shit! I quickly turned off my PC and took the CPU cooler off again. The CPU cooler's PIN connector wasn't on there right (it was half on there like one of the three pins were in the PIN socket) so I took it off and connected it again. I wiped off the thermal paste again. This time I was running out of thermal paste. I put just a little,little bit less than what I usually put on there. I wouldn't think that would be the problem because it was still a pea sized amount. But I turned my PC on, gladfully because everything was installed finally. I looked at my temps. Idle CPU temps were about 4c lower than what they usually were (before I added case fans it was 30c idle-remember I OC'd to 4.5Ghz-and after I added case fans it was 27 or 26c idle.) and my GPU temps were about 2c lower than what they usually were. I though this was good so I tried playing battlefield 4 and remember how I said my temps never went above 55c? well now they were in the mid 60's. WTF? why did my temps decrease idle but increase load? My GPU temps went down both ways though. before I added case fans it idled about 41 or 42c and loaded about 69-72c. After I added case fans it idled about 39c and loaded about 62c. Why could my CPU temps be higher?
 
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nukemaster

nukemaster

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Nov 23, 2004
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A variation in room temperature will cause variations in systems temperatures.

You should list the case and how the fans are set up.

Too much thermal paste could be an issue as well. It is just to fill the thin imperfections in the cooler and its base. Also when you replace thermal paste, make sure you clean the old stuff with isopropyl alcohol.

Also note that 62 will NOT hurt a cpu in any way(start to worry over maybe 75-80. panic at 90+).
 
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B

blinding

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Can you describe how you set the fans up? Which ones are blowing in and which are exhausting hot air out?

You could try unplugging some of the fans you added and see what that does to the temperatures. Some fans, side fans are a known example, can divert the air flow away from the CPU and make temperatures worse.


 
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Meaning_Raptor

Meaning_Raptor

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https://www.dropbox.com/s/ilyrept8k9p5ft6/IMG_6578.JPG?dl=0

This is my front fans. Two of them. They are both 140mm and they suck air in.

https://www.dropbox.com/s/odoojob2njcycgl/IMG_6575.JPG?dl=0[

these are my top two fans. They suck air out of the top. They are pretty close to the CPU itself. like not a centimeter above them.

https://www.dropbox.com/s/c75dd9bip63saia/IMG_6574.JPG?dl=0

this is my cryorig h7 and my back fan. I have checked the airflow by sticking my hand in front of the back and the top fans and they are blowing out so I know the airflow is correct.
 
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nukemaster

nukemaster

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Your fans look perfect.

I would guess when running for a while the extra heat from parts(video card heat will get mixed with the case air) in the case starts to effect cpu temperatures.

It is not harmful at all and you are well within the specs for the hardware.
 
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Meaning_Raptor

Meaning_Raptor

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Nov 19, 2014
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Yeah I know I'm not in the harmful temperature range, I just wonder why my temps went up some. I will get some more thermal paste and see if that makes it better.
 
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nukemaster

nukemaster

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I am guessing room temperatures or a slow case warming from the other electronics in the system.

My system starts out cooler than slowly rises to its steady state temperature and my video card and cpu are cooled with all in one liquid coolers as exhaust so heating should be minimal, but I still have a certain amount of rise on the idle before it levels off.
 
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Meaning_Raptor

Meaning_Raptor

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Just a thought but could turning on the pc without the cooler running hurt it? because It only happened once
 
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jsmithepa

jsmithepa

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The picture of your CPU fan is not exactly clear and you mentioned no blow direction on this fan, but I will assume it blows from the front of the case toward the back. If this is the case, I'd remove the top fan, the one that's "in front" of the cpu fan and block off that hole.

The theory is, your front fans suck in cold air, so there is this pocket of cold air in front of the case, now before the CPU fan can use it, a lot of it is immediately suck out the top. Blocking that hole will give the CPU fan the chance to use that cold air.
 
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nukemaster

nukemaster

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No, with that much cooling area you could idle for a long time without overheating. Just the air from the top fan would remove some heat too

Certainly a good idea.
I actually have that setup in a Fractal Define R2 case(had the 2 on top for a while without much difference, I just wanted to remove a fan for noise level reasons.).

EDIT.
Just tossing this out.

You can see the initial start up is cooler(min values) then the later idle is hotter(current). You also see game loads under max.
2d95xtx.jpg
 
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G

gonf

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Sorry can't tell much from a pic if you are doing push pull right....
for most setup. you want to do a 50 50 push pull ratio. for example. 50% of the fan taking air in from the front and 50% of the fan blowing hot air out to the back. and if the back of your computer face a wall. you can always mount a fan blowing hot air up from the back of your case. it helps a lot in my case.
 
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