Really Loud Computer?

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Jarrett_1

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Jul 16, 2016
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Hey, my computer that I made a few months back runs really loud (pretty sure it's the fan speed) and was wondering how I could fix that so it doesn't run so loud? I downloaded speedfan so I could see what my fans are set to and it says this:

Sys Fan: 0RPM
CPU Fan: 1467 RPM
Aux Fan: 1125 RPM
Aux1 Fan: 0 RPM
Aux2 Fan: 1146 RPM
Aux3 Fan: 0 RPM
GPU Fan: 738 RPM

I'm guessing based off this its my CPU fan that's being loud? How can I change it so it runs slower and what would be a good speed?
 
Solution
synphul
Gpu's tend to get pretty hot, especially if there's no backplate and the components are exposed. Only the underside of the card where the gpu and vram are located are actively cooled, the back relies on case airflow.

If your case is vibrating that can definitely make things louder. Maybe it's due to being on the carpet even though it's on tiles, carpet really isn't that stable. It could be your fans, not sure which fans you're using but some are out of balance and can vibrate. Usually happens with more budget oriented fans. Depending where and how they mount you might be able to use rubber/silicone grommet type fasteners in place of the screws that hold your fans in place on the case. They act as a soft pad to isolate a vibrating fan...
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synphul

synphul

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Mar 11, 2011
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The easiest way to determine which fan is loud is to remove the side cover of the case and have a listen. Using a tube like a paper towel tube can be helpful to isolate noises. Some fan noise is from the fan's bearing though much of it is wind noise either from the blade design at a certain speed or the airflow hitting obstructions. Hard drive trays, fan grills, case mesh panels or air filters can all attribute to it.

For something like cpu cooler speed it also depends on temps. Ambient room temps, overall case airflow and cpu temps with whatever specific cooler you're using. You could lower the speed of your cpu fan but temps will go up. It's possible it's just running at full speed when it doesn't need to be, it's also possible that your cpu temps and specific cooler combo the fan is having to ramp up to keep it cool and lowering fan speed could cause overheating. No way to know without knowing what your cpu temps are and what cooler you're using.
 
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Jarrett_1

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Jul 16, 2016
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Thanks for your help, these are the temps speed fan is giving me currently
System: 32C
CPU: 35C
AuxTIN0: -128C
AuxTIN1: 50C (doesn't exist)
AuxTIN2: 22C
AuxTIN3: 28C
HD1: 31C

For my CPU cooler I am using the fan that came with my CPU which was an i5-6500
 
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synphul

synphul

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Mar 11, 2011
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35c sounds like the idle temp. Does the cpu fan sound loud? Have you listened to it specifically, not talking about rpm's listed in speedfan. If the cpu fan sounds loud have you looked in the bios to check cpu fan speeds? Depending on what motherboard you have there may be a setting for creating a fan curve in the bios assuming your cpu cooler fan is plugged into the "cpu_fan" header on the motherboard.

Fan curves use thermal readings to adjust the cooler's fan speed as needed, aka if the cpu is reading 40c or under it might run the cpu fan at 25% speed, at 50c it might increase fan speed to 50% and at 65c it might boost the fan all the way to 100%. Usually you can adjust those settings, reducing or increasing the temp that triggers the fan to spin faster or slower and what % speed the fan should run at.

It's important to make sure though that you've provided enough fan speed to handle the temps at 100% cpu load. In order to do that you'll need to stress test the cpu and watch your temps, not go by idle temps. It's possible for a cpu to run cool at idle and still overheat under load if you set the fan curve too low and the cooler can't keep the cpu cool enough when you need it most.
 
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Jarrett_1

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Jul 16, 2016
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I tried to listen to each fan after I took off the siding, it's hard to tell but they sound pretty equal overall. I'm wondering if its just the case maybe? Where my computer usually is, is on the floor touching the wall but I put some tiles under it so it doesn't touch the carpeting and of course right next to it is my desk so it's kinda blocked in and when I touch the sides of the case I can feel the vibrations from the fans. Even with headphones on I can still hear the fans pretty easily and they are louder than my ceiling fan on high speed. I went into the bios and set it into power saving mode to see if it will make a different, i'm not sure yet.

Edit: I should also add that my graphics card when I touched the top of it was really hot (almost too hot to touch) but that could probably be normal, the temperatures said it was fine
 
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synphul

synphul

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Mar 11, 2011
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54,965
Gpu's tend to get pretty hot, especially if there's no backplate and the components are exposed. Only the underside of the card where the gpu and vram are located are actively cooled, the back relies on case airflow.

If your case is vibrating that can definitely make things louder. Maybe it's due to being on the carpet even though it's on tiles, carpet really isn't that stable. It could be your fans, not sure which fans you're using but some are out of balance and can vibrate. Usually happens with more budget oriented fans. Depending where and how they mount you might be able to use rubber/silicone grommet type fasteners in place of the screws that hold your fans in place on the case. They act as a soft pad to isolate a vibrating fan from the case so vibrations can't amplify throughout the case. Good for vibration/buzzing/rattling type sounds.

This is an example of what I'm talking about. You use them in place of screws. There are other variations out there, but at least it's a starting point.
https://www.amazon.com/Cosmos-Pieces-Rubber-Mounting-Screws/dp/B00H9905KA

Another option if controlling the fans via the bios doesn't get what you're after there are fan speed controllers that fit in a 5.25" bay if you have one available. Both ones with sliding physical controls or knobs or some with touchscreens.

This one is somewhat limited, it's not completely variable but offers high, med and low speeds for up to 6 fans and it's touchscreen for around $12.
http://www.newegg.com/Product/Product.aspx?Item=N82E16811999219&ignorebbr=1
 
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