Cabinet mute rebuild log

2010.04.24 outdoor temperature: 9.3 ℃

Remove one side of the panel, erect the chassis, and the sound of resonance disappears.
And disable the built-in front fan to further reduce the volume. Now only the video card + CPU + power supply fan is switched. To further reduce noise, you can only start from here.

Opening the chassis side cover helps to reduce temperature and eliminate Resonance
CPU 832 to 29 ℃
The same speed of the video card is 55%, and the temperature drops from 67 ℃ to 58 ℃.

2010.04.24 outdoor temperature: 10.7 ℃

CPU: e5300 2.6g overclocking 3.0 30 ℃
CPU fan: Jiuzhou Fengshen Alpha 400 plus 832 rpm
At the current speed, the volume is very small, but it is very noisy at full speed. We recommend that you change the mute fan.

Graphics: Ang da 9600gso 384 M built-in fan 55% speed 67 ℃
The fan that comes with the video card is very noisy. The next time I change the card, the heat is good, and the fan speed can be adjusted hierarchically.

Chassis: Cool extreme destroyer RC-K100
The chassis comes with a front fan, which is very quiet and does not seem to have much effect on cooling

Rear fan: the fan is not enabled for the 120mm ultra-high frequency, trigger, and mute Chassis
Low volume, low heat dissipation

Graphics card side board fan: Super frequency three tornado 80mm super quiet chassis fan not enabled
Low Volume, installation on the side panel will cause vibration, but it will not improve the heat dissipation

Both sides of the chassis bezel: soundproof Cotton
Unknown Effect

Power Supply: Great Wall dual-power mute 400sel ATX 2.31 version rated 300 W
The volume is very small, the power cord head is provided less, and the wire head is not long enough, resulting in failure to plug in the fan speed control headers of two Chassis

Summary:
CPU fan + graphics card fan + chassis built-in fan + rear fan + graphics card side board fan a total of five fans are still very noisy to run together
The main noise source is the video card fan. Priority should be given to it. We recommend that you change the card of the static audio version to a smaller value.
As long as the graphics card is cooled, the remaining two chassis fans can be disabled

At the same time, when the chassis panel is closed, there seems to be a bit of reason, because of the vibration?
I don't know how some brand machines mute the chassis.