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Discussion Starter · #1 ·
Hi everyone,

This is my system spec

Asus P8Z68-V Pro MB
intel 2500K cpu
Noctua D14 cpu cooler
Seasonic X series 750W power supply
8gb Patriot gamer series ddr3 ram
Crucial M4 128gb SSD
Nvidia 8800 GT

My Noctua fan is always running at Max speed, 1320rpm and 1220rpm between the 120mm and 140mm fan. It used to be much more silent on my older power supply Antec HCG 900W. Then I switched to the Seasonic X series 750W and now I can always hear the fan on my Noctua. I tried setting the speed of the fan manually in BIOS and no setting are lowering the rpm of either fan setting. I'm using the power from "cpu" and "opt cpu" plug for my Noctua fans.

Any suggestions for people that have the same MB and Heastsink setup?
Thanks in advance.
 

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can u tag in some pics ?? i bet its not the HSF fan the seasonic 750w PSu has a dotted grill the same thing happens with my case rear fan the dotted grill does not allow a free passage of air were as the sntec PSU had a simple grill to the fan so the airflow was smooth i prefer u cut the grill and grab something like this http://www.newegg.com/Product/Product.aspx?Item=N82E16811995045
 

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:DWelcome to OCN:D:band:
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njoy the OCN fellowship
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Discussion Starter · #4 ·
I don't believe it's the airflow. I have my side panel open and I've turned off ALL my 120mm fans and just have the Noctua running. Let's just say you can hear it at night sitting 2 feet away. I was hoping to get a silent HSF not one that's running at max all the time.

Here are some pics
 

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sorry to confuse u but the rear exhaust fan of mine was just an example
here this may give u a better idea sorry done Ms painting after many years:p
 

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Discussion Starter · #7 ·
I understand what you're trying to say, but from my picture above, the side panel is opened. Airflow shouldn't be the cause of it, since the HSF is blowing from front to back.
 

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Discussion Starter · #8 ·
After getting suggestions from others, I've installed the Ultra low noise adapter and now my fans are running at 920rpm. Much quieter from before.

I always thought my MB with the smart fan management, it will run the fan at a low rpm at idle. Guess I have too much faith in my MB.
 
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