Thermalright Silver Arrow Dual 14cm Fan Cooler

Cooling
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STOCK FAN MEASUREMENTS

The Silver Arrow ships with a pair of Thermalright's TY-140 fans. The TY-140 is a 14 cm seven blade fan with curved struts to produce a desirable angle with the trailing edges. The blades are rather unusual in that the leading corners are rounded and the trailer corners seem to have been cut so they are not perpendicular. The housing is also an unusual shape.

Specifications: Thermalright Silver Arrow Stock Fan
Manufacturer
Power Rating
2.4 W
Model Number
TR-TY140
Airflow Rating
56~73 CFM
Bearing Type
Hyper-Flow
Speed Rating
900~1300 RPM
Corners
Open
Noise Rating
19~21 dBA
Frame Size
152 x 140 x 26 mm
Header Type
4-pin PWM
Blade Diameter
130 mm
Starting Voltage
4.9 V
Hub Size
42 mm
Weight
160 g
Data in green cells provided by the manufacturer or observed; data in the blue cells were measured.

Stock Fan Measurements
Voltage
Avg. Speed
SPL @1m
One Fan
Two Fans
12V
1290 RPM
23~24 dBA
26 dBA
9V
1000 RPM
18 dBA
19~20 dBA
7V
780 RPM
13 dBA
14 dBA
6V
650 RPM
12 dBA
12~13 dBA
Measuring mic positioned 1m at diagonal angle from the center of the heatsink.
Ambient noise level: 10~11 dBA.

The stock fan's acoustics are average at 9V and above. The fan generates a dry, tonal hum that decreases with speed, but it is always audible at close proximity. At 7V and below, it is barely noticeable at one meter, and if enclosed in a good case, it should be inaudible. The measured noise level is very low for a fan of its size and speed, generating just 23~24 dBA at full speed and approaching our anechoic chamber's noise floor at 6V.


At 9V, the stock fan generated some tonality at ~350 Hz.

COOLING RESULTS

Fan
Voltage
One Fan
Two Fans
SPL@1m
Thermal Rise
Thermal Rise
SPL@1m
Stock Fan: Thermalright TY-140
12V
23~24 dBA
36°C
34°C
26 dBA
9V
18 dBA
38°C
35°C
19~20 dBA
7V
13 dBA
42°C
38°C
14 dBA
6V
12 dBA
46°C
40°C
12~13 dBA
Alternate Fan: Noctua NF-P14
12V
28~29 dBA
37°C
34°C
30~31 dBA
9V
21 dBA
39°C
35°C
22~23 dBA
7V
15~16 dBA
45°C
39°C
16~17 dBA
6V
13 dBA
49°C
41°C
14 dBA

The overall performance of the heatsink with both the stock and reference fans was excellent. We found that the Thermalright fan consistently outperformed the Noctua fan at similar noise levels. The biggest difference was at 13 dBA@1m, where the TY-140 led the NF-P14 by a massive 7°C. With two fans, the Noctua caught up a bit, but was still beaten by 3°C at 14 dBA@1m. The NF-P14 has smoother acoustics, but at lower fan speeds and enclosed in a PC chassis, both should be too quiet to notice.

Using two Thermalright fans rather than one lowered the temperature by 2° to 6°C, depending on fan speed. Our reference fan was more successful when doubled up, improving cooling by 3~8°C. It seems the Noctua fans work better as a tandem on the Silver Arrow.



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