CPU fan spinning too fast and loud

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Shadow Slasher

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Jul 11, 2016
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It's a bit complicated but I'll put it down into as few words as possible.
I upgraded my PC from this:
Mobo: Foxconn 2ABF
GPU: AMD Radeon HD 6450
CPU: Intel Core i3 2100
4 GB Ram
PSU: Stock 300W

To this:
Mobo: ASRock H61-VG4
GPU: Nvidia GTX 950 Armor 2X
CPU: The same
8 GB Ram
PSU: EVGA 400W

So today when I replaced the motherboards,I noticed that the chassis fan cable couldn't reach the 4pin connector to the mobo.So I just removed it and placed it near the CPU fan,like 1mm apart from each other.Started up the PC and heard too much noise from the CPU fan and high speed spinning.I managed to go to BOOT menu and lower the speed of the fans from Level 10 to Level 1.The thing is that whenever I play a game the CPU fan starts spinning too fast again.Is it because the fans are near to each other,thus making the air to move more difficult inside ? Or is it just something else ?
 
Solution
Kaplak
Try removing the chasis fan. Since you're not overclocking your temps are probably good enough without it. If that fixes the noise your all set. Let me know how it goes
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Kaplak

Kaplak

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It could be an airflow issue, but let's figure this out.

Did you cleaned the thermal paste and used new thermal paste after moving the cpu to the new mobo? If the answer is yes, try to upload a picture of the fans mentioned before. If the answer is no, then I recommend you change the thermal paste/compound.
 
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Kaplak

Kaplak

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Try removing the chasis fan. Since you're not overclocking your temps are probably good enough without it. If that fixes the noise your all set. Let me know how it goes
 
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Solution
Kaplak

Kaplak

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Not at all man. The only fan you really need is the cpu fan. The rest is just to improve airflow and temps, which do not go higher than normal during normal workload and without overclocking.

We are just testing anyway.
 
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Karadjgne

Karadjgne

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If the chassis fan is spinning at a different rpm than the cpu fan, being that close, what you'll get is forced air from the cpu fan hitting the blades of the chassis fan. That'll make noise, mostly an echo bouncing off the blades. It also creates turbulence, (think cavitation on a submarine) that'll also make noise.

Best bet, put the chassis fan back where it really belongs as the rear exhaust, and either turn the fan around until the cable reaches, or buy a cheap fan cable extension, 3"-6" should probably work.
 
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Shadow Slasher

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so looks like our problem is the airflow,we were right.i removed the chassis fan,pc started up and there is no noise at all,just like before :) now I have the ASRock extreme tuner and im keeping an eye over the Motherboard temperature (right now its 33 C) ill try playing some of the latest game ( the witcher 3,black ops 3 etc) and see how the temps go inside the case.
btw which is the recommended (normal) motherboard temperature ?

UPDATE : i just played a game,and the CPU fan started to spin a lot faster again in 4400-4500 RPM.also i should highlight the fact that the PC used to stand in vertical position,but now I've moved it into horizontal orientation for some space pursposes.
 
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Shadow Slasher

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you are right,but first of all ill check if everything goes OK without the chassis fan.if i get too much temperature ill just buy a cheap fan with a longer cable :)
 
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Karadjgne

Karadjgne

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Noooo! Buy a good fan, cheap. Cheap fans, cheap, will get you just as much noise as you started with.

You can get a great fan like a Phanteks for @$12 or so. You've done a nice little upgrade for a more pleasurable experience gaming, no point in getting stingy now over a few $ and ruin it. Just saying.
 
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Shadow Slasher

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yes you are right i can afford a new fan that's not a problem.and yea thanks that build cost me about 250 $,it was totally worth it and im having really good experience with the latest games around :)
 
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Karadjgne

Karadjgne

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Grab an i5 off eBay, night and day difference on some games. I run a 3570k and a 3770k, and yes there is a difference (helps that both are OC, 4.3 and 4.6).

Mobo temp of 33 is fine, my case temps range from 30-35 depending, but that reading is a little misleading since it could be tied to one of several different components. General guidelines set cpu at @ 70 and gpu at @ 80 as tops for continuous usage. As long as mobo doesn't really get higher than @ 40, don't see any problems.

Horizontal or vertical doesn't make too much of a difference to anything but the optical drive and airflow. Heat rises by natural thermal properties, so exhaust fans are set high for that reason and intakes low. Turning the pc horizontal just means that your left side panel is now the top, so without decent airflow, that's where all the heat will collect, and the right side (top of mobo) will see lower temps, and left side (by gpu) will see higher temps. So keep an eye on gpu temps when gaming, but cpu will be doing good.
 
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Kaplak

Kaplak

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I'm glad I could help. 30-45 degrees is the normal temps for mobos. One thing you can also do is get a fan controller for the chasis fan or fans, with this you can control the chasis fan speeds manually at any time and also it will help you connect the fan with the short cable as they have extensions included =D. Here's some to consider:

https://www.amazon.com/s/ref=nb_sb_ss_c_3_14?url=search-alias%3Dcomputers&field-keywords=pc+fan+controller&sprefix=fan+controller%2Caps%2C178&rh=n%3A541966%2Ck%3Apc+fan+controller

Keep us posted on the matter, you can PM me anytime and don't forget to select the best answer to close the topic. Have fun!
 
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Shadow Slasher

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im glad you helped me and told me the steps to follow. they were correct,now everything seems to be working just fine.playing latest games and mobo temp doesn't go above 40 C even without the chassis fan,and the CPU temp doesn't go above 50 C(level 1 fan speed).so once again thanks ! :)
 
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