Coolermaster Sileo 500: Quiet ATX Midtower Case

Cases|Damping
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TESTING

System Configuration:

Measurement and Analysis Tools

  • CPUBurn K7 processor stress software.
  • FurMark stability test to stress the integrated GPU.
  • GPU-Z to monitor GPU temperatures and fan speed.
  • SpeedFan to monitor system temperatures and fan speeds.
  • Seasonic Power Angel AC power meter, used to measure the power consumption of the system.

Stock Fan Measurements

Stock Fan Noise Level
Fan Voltage
Rear Fan Speed
Front Fan Speed
Combined SPL
12V
850 RPM
890 RPM
18 dBA
9V
660 RPM
700 RPM
14 dBA
7V
520 RPM
570 RPM
12 dBA

Another pleasant surprise is the noise level of the included fans. They are low speed varieties with a maximum speed of about 900 RPM. The noise they generate is smooth, though there is some clicking coming from the bearings. This noise is annoying in the open or in our anechoic chamber, but tucked away inside the padded case, it wasn't audible unless we put our ears right up against it. For silent PC neophytes, leaving the fans at maximum speed would be acceptable — they sound smooth and unobtrusive.

Test Results - Configuration #1 (IGP)


Case with test system installed (integrated graphics).

System Measurements (IGP)
State
Idle
Full CPU + GPU Load
System Fan Speeds
7V
12V
Hard Drive
Placement
On Floor
In Cage
Noise Level
15 dBA
17~18 dBA
20 dBA
CPU Temp
31°C
32°C
55°C
54°C
SB Temp
33°C
32°C
38°C
37°C
HD Temp
34°C
33°C
34°C
33°C
Ambient temperature: 22°C
CPU fan at 9V.

Housing a system with a 125W CPU, quality CPU cooler, and integrated graphics, the Sileo 500 performed fairly well given the level of noise that leaked through. With the CPU fan set to a static 9V, the noise level of the system measured 20 dBA in its stock configuration. Slowing down the system fans to 7V resulted in a 2~3 dBA reduction. Removing the hard drive cage and placing the drive on the foam-covered floor resulted in an additional 2~3 dBA improvement. Our WD Black drive is fairly high in vibration, and the plastic sleds used to dampen it just wasn't enough — the drive made a measurable impact on noise. Fortunately, the acoustics of the system were very smooth and benign no matter what fan speeds were utilized or where the hard drive was mounted.

At idle, all the recorded temperatures were in the low 30's, whether the drive cage was removed or not. On full load, the CPU temperature reached 55°C, the southbridge temperature hit 38°C and the hard drive temperature remained unchanged. Increasing the system fan speeds from 7V to 12V had a negligible effect on temperature — it seems that a 300 RPM difference in fan speed is not enough to make a measurable impact on our system configuration.

Sileo 500 vs. P183: Full Load (IGP)
State
Sileo 500
Antec P183
Rear / Front
Fan Speed
12V / 12V
Low / N/A
Noise Level
20 dBA
19~20 dBA
CPU Temp
54°C
50°C
SB Temp
37°C
38°C
HD Temp
33°C
37°C
Ambient temperature: 22°C
CPU fan at 9V.

The Sileo 500, with both system fans at full speed generates about the same amount of noise as the Antec P183 with its rear fan set to low. The presence of the faster spinning Antec TriCool fan results in the P183's lower CPU temperature while the Sileo 500's front fan gives it an advantage in hard drive temperature.



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