SilverStone Argon AR02 CPU Cooler

Cooling
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Stock Fan Measurements

Specifications: SilverStone Argon AR02 Stock Fan
Manufacturer SilverStone Power Rating 2.64 W
Model Number AS9225SH12 Airflow Rating 56 CFM
Bearing Type Hypro (sleeve) Speed Rating 2800 RPM
Frame Size 92 x 92 x 25 mm Noise Rating 24 dBA
Hub Size 33 mm Header Type 4-pin
Blade Diameter 86 mm Corner Type Open
Cable Length 30 cm Weight 70 g
Starting Voltage 4.0 ~ 4.5 V Retail Availability No
Additional notes:

The unremarkable 92 mm 4-pin PWM fan has a high nominal speed of 2800 RPM. The struts straight and the fins are broad with sharp corners. It's a stark contrast to the structure of the unusual AR01/A03 fan.

Stock Fan Measurements
Voltage
Speed
SPL@1m
12V
2770 RPM
36 dBA
9V
2190 RPM
29 dBA
7V
1590 RPM
20~21 dBA
6V
1290 RPM
16 dBA
5V
880 RPM
12 dBA
Measuring mic positioned 1m at diagonal angle from the center of the heatsink.
Ambient noise level: 10~11 dBA.

The stock fan generates an extremely loud 36 dBA@1m at full speed but on voltage control, comes down to a virtually silent 12 dBA@1m at 5V. It becomes what we consider quiet at about 1500 RPM. According to the specifications, PWM control can take the speed down to about 1200 RPM, a level which should be very quiet for most users.

Like many sleeve bearing models, the AR02 has a turbulent and whiny nature at higher speeds. At about 7V (1590 RPM) and below it starts to buzz, and at 6V (1290 RPM) and under some bearing chatter is also audible up close. Its acoustic character is generally similar to that of the AR01/AR03 fan except it has a rougher, more muddy sound. Looking at the frequency spectrum, there are additional minor tonal peaks not present in the AR01/AR03 fan profile.

Test Results

SilverStone Argon AR02
Fan Voltage
Fan Speed
SPL@1m
°C Rise above Ambient
CPU
VRM
Stock Fan
12V
2770 RPM
36 dBA
33
28
9V
2190 RPM
29 dBA
34
29
7V
1590 RPM
20~21 dBA
36
31
6V
1290 RPM
16 dBA
38
33
5V
880 RPM
12 dBA
43
35
Reference Nexus 92 mm Fan
12V
1470 RPM
20 dBA
36
29
9V
1290 RPM
16~17 dBA
42
37
7V
1010 RPM
12 dBA
49
40

Tested on our mildly overclocked/overvolted Core i5-2400, the CPU temperature stabilized at 33°C and 43°C above ambient at 12V and 5V respectively, a fairly wide spread. The sweet spot is somewhere in the 1300 to 1600 RPM range. Very low fan speeds results in a considerable drop in performance and is not recommended.

Our reference Nexus 92 mm fan stayed on par with the stock fan at the 20 dBA@1m level but at lower speeds, it lost by a substantial margin. Though the stock fan doesn't sound nearly as nice, it's more ideally suited to cooling this particular heatsink.



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