Thermalright HR-02 Macho Quiet/Fanless Cooler

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STOCK FAN MEASUREMENTS

Specifications: Thermalright HR-02 Macho Stock Fan
Manufacturer
Power Rating
2.4 W
Model Number
TR-TY140
Airflow Rating
56~73 CFM
Bearing Type
Hyper-Flow
Speed Rating
900~1,300 RPM
Corners
Open
Noise Rating
19~21 dBA
Frame Size
151 x 140 x 26 mm
Header Type
4-pin
Fan Blade Diameter
132 mm
Starting Voltage
5.2 V
Hub Size
41 mm
Weight
160 grams
Data in green cells provided by the manufacturer or observed; data in the blue cells were measured.

Stock Fan Measurements
Voltage
Speed
SPL@1m
12V
1260 RPM
22 dBA
10V
1070 RPM
19 dBA
9V
970 RPM
15 dBA
8V
850 RPM
14 dBA
7V
730 RPM
12 dBA
Measuring mic positioned 1m at diagonal angle from the center of the heatsink.
Ambient noise level: 10~11 dBA.

The HR-02 stock fan is the same model included with the Silver Arrow and Shaman. It is fairly quiet for a 140 mm model, producing only 22 dBA@1m at full speed, and almost inaudible at 7V while spinning at 730 RPM. It doesn't have great acoustics, though, as the motor generates some undesirable noise. Between 800 and 1100 RPM there is an audible hum with some slight clicking. Thankfully, at one meter distance with a case side panel running interference, it would be difficult to detect.


At 10V, the stock fan emits a noise level of 19 dBA@1m. It has some tonal elements, peaking near 200 and 300 Hz.


TEST RESULTS

Thermalright HR-02 Macho
Fan Voltage
SPL@1m
Temp
°C Rise
Stock Fan
12V
22 dBA
58°C
38
10V
19 dBA
59°C
39
9V
15 dBA
60°C
40
8V
14 dBA
61°C
41
7V
12 dBA
63°C
43
Reference Noctua 140mm Fan
12V
28 dBA
56°C
36
9V
21 dBA
59°C
39
8V
19 dBA
61°C
41
7V
15 dBA
63°C
43
6V
13 dBA
65°C
45
Reference Noctua 140mm Fan x 2
12V
31~32 dBA
54°C
34
9V
25 dBA
55°C
35
8V
22 dBA
56°C
36
7V
18 dBA
57°C
37
6V
15 dBA
60°C
40
°C Rise: Temperature rise above ambient (20°C) at load.

The Macho performed very strongly, keeping the thermal rise above ambient at about 40°C using the stock fan. There was only a variance of 5°C between full speed and 7V. While we prefer the sound of our reference Noctua fan, it simply wasn't as efficient, losing by 2~3°C at similar noise levels to the stock fan. A second Noctua helped considerably, lowering the CPU temperature by 5~6°C between 6V and 8V.

We ran into one odd little problem when we swapped out the stock fan. The X-Silent fan is 1 mm thicker than the standard 25 mm and the Macho's fan clips are designed to take this into account. As a result, our reference fan hung a bit loose when used with the stock clips. Oddly enough, the clips from the Silver Arrow, which we borrowed to test the dual fan configuration, had no issue as it seems to be designed to fit tighter.



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