Make my PC quieter?

ConorC

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Hi everyone,
I was just wondering if anybody has some advice on making my PC run quieter. Here's what I've got:
Cosair Obsidian 750D
Corsair H100i (with stock AF120 fans)
3 Corsair AF140 fans that came with the case
and a Be Quiet! Pure Power L8 630W PSU
 

fields224

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well first thing would be to go into bios and if you can edit cpu and case fan speeds on idle, what i do is have them run at around 60% speed until the cpu starts to get hot from use where they ramp up to counter the heat, works perfect.

if you still have noise then i would say best bet is to replace the af120s on the water cooler as they can make quiet a bit of noise blowing on the fins.
 

ConorC

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Asus R9 280x Matrix
 

ConorC

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Thanks, I'll try that out right now.
 

ConorC

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So, what do you suggest I do? Get a new GPU?
 

fields224

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well really you need to make sure the gpu is the loudest part of the system, it could be other fans that are louder, but if it is the gpu, you could use msi afterburner to create a custom fan curve, the lowers the fan speed of the gpu until temps get hot, then ramp up the fans.

if you want a quieter gpu i would recommend the msi twin frozr IV series as for me it has been the quietest i have used.
 
The H100i produced modern vacuum cleaner like noie levels at 60 dBA .... while all the dB charts put the vacuum cleaner at 70 dBA (typical for the 1970s), most of today's units are down closer to 60 .... right where the H100i is .... I find the noise from the 100i unbearable after about 55% CPU loading..... Watch .... er listen to the video here.

http://martinsliquidlab.org/2013/03/12/swiftech-h220-vs-corsair-h100i-noise-testing/

On top of that the new Radeon series is just about as loud as the 100i .... together, they can produce sound levels up close to 65dBA

The 750D is a fairly decent box for custom water cooling..... I'd suggest looking at this thread here for some ideas.

http://www.overclock.net/t/1430077/corsair-750d-owners-club

Otherwise....the H110 is quieter but again, these AIO water coolers really offer no significant thermal advantage over the better air coolers. A $75 Phanteks PH-TC14-PE has a slight thermal advantage over the Noctua shown below and is about 1/4 as load as the H100i

index.php


Other than a custom loop, the best I can suggest is:

1) Phanteks air cooler, H110 or step up to another level with something like the Swiftech kit.

2) Use only quiet mode on the 280x BIOS

3) If you have an Asus board, use AI Suite 3 to control fan speeds or use some other software equivalent such as SpeedFan. BIOS control will work but it's generally not as flexible as these options.


You could change fans on the H100i but it severely curtails thermal performance .... why pay $110 for a cooler and then spend $30-40 for quiet fans to make perform like a $35 - $50 air cooler.
 
If you wanted quiet, you made some less than optimal choices for parts.

To deal with what you have, you want to reduce the rpm's of your loudest fans.
You can do this with some fan controllers for the case fans and by dialing back the performance of your graphics card and liquid cooler.
Some fans are a bit better than others, but generally it is not worthwhile to change them out.
If you can gat a fan <600rpm, it will be inaudible.
<1100 rpm, it will be quiet.
>1500 rpm it will be noisy.

 

ConorC

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At idle or while gaming?
 
Those rpm guidelines are applicable to either idle or under load.
If you use headphones then perhaps it does not matter.

I happen to prefer a constant drone of fan noise compared to a constant increase/decrease.
CPU and graphics parts can run hot, but they are built to tolerate heat.
My take is to let them heat up, at least to the point before they will throttle performance.
On case fans, low noise adapters can turn your fans down to perhaps 600rpm. below that, they may not start.
On the cooler and graphics fans, you will need to check out their controls. If there is a constant setting or a max speed setting, I would go for that.
 
To get an idea of what Water Cooling may bring. I have (5) 140mm 1200 rpm Phanteks Sp140 fans on my radiators and (5) of the same in my case. At 1238 rpm, they are audible, but I never see that unless I set fans to rpm made and manually set them to full speed. Under AiSuite3 control, they start out at about 350 rpm and will raise to a max of 850 rpm under Furmark. They are completely inaudible at those rpms. CPU tops out at 74C at 4.6 Ghz (4770k) and GFC cards top out at 39C w/ fans at full speed and 44c under AISuite Control.