Scythe Big Shuriken 2 & Reeven Vanxie CPU Coolers

Cooling
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Stock Fan Measurements

Specifications: Scythe Big Shuriken 2 Rev.B Stock Fan
Manufacturer
Power Rating
4.68 W
Model Number
SY1212SL12H-P
Airflow Rating
45.47 CFM
Bearing Type
Sleeve
Speed Rating
2000 RPM
Corners
Open
Noise Rating
33.67 dBA
Frame Size
120 x 120 x 12 mm
Header Type
4-pin
Fan Blade Diameter
113 mm
Starting Voltage
6.0 V
Hub Size
39 mm
Weight
80 g
Data in green cells provided by the manufacturer or observed; data in the blue cells were measured.

Like its predecessor, the Big Shuriken 2 uses a slim 120 mm Slip Stream fan, a necessary compromise to keep the cooler's height in check. The Slip Stream series has been a favorite of ours, an old standby that has never disappointed acoustically. This particular model is essentially the same as the original Big Shuriken, only a faster variant with a nominal speed of 2000 rather than 1600 RPM.

Stock Fan Measurements
Voltage
Speed
SPL@1m
12V
1960 RPM
30 dBA
9V
1560 RPM
23~24 dBA
8V
1340 RPM
19 dBA
7.5V
1100 RPM
14 dBA
7V
830 RPM
11~12 dBA
Measuring mic positioned 1m at diagonal angle from the center of the heatsink.
Ambient noise level: 10~11 dBA.

At maximum speed, the Big Shuriken 2 stock fan produces 30 dBA@1m measured on the heatsink, fairly loud by our standards. It's much quieter undervolted, but becomes temperamental below 7V, at which point slight changes in voltage result in a drastic reduction in fan speed; PWM control is preferable. There's also a big drop-off in noise between 8V and 7.5V despite there only being a speed difference of 240 RPM.

At 8V and above, the noise generated is dominated by the turbulence, the soft sound of the air being pushed through the heatsink fins. At 7.5V it develops a bit of a buzzing sound, but it's only audible at close range. At one meter's distance it's almost inaudible at this level, measuring just above our anechoic chamber's noise floor of 10~11 dBA.


The Big Shuriken 2 stock fan at 8V measures 19 dBA@1m.

At quieter noise levels, our acoustic analysis shows no significant peaks across the majority of the frequency range, indicating a lack of tonality. It has a pleasant, broadband profile.

Specifications: Reeven Vanxie Stock Fan
Manufacturer
Power Rating
2.4 W
Model Number
RY8010S33C-P
Airflow Rating
24.82 CFM
Bearing Type
Sleeve
Speed Rating
3300 RPM
Corners
Closed
Noise Rating
32.5 dBA
Frame Size
80 x 80 x 10 mm
Header Type
4-pin
Fan Blade Diameter
74 mm
Starting Voltage
5.6 V
Hub Size
29 mm
Weight
40 g
Data in green cells provided by the manufacturer or observed; data in the blue cells were measured.

The Reeven Vanxie is also equipped with a low profile fan, an 80 mm sleeve bearing model that's only 10 mm thick. Given the size of the heatsink, Reeven opted for a high speed model running at 3300 RPM.

Stock Fan Measurements
Voltage
Speed
SPL@1m
12V
3290 RPM
33 dBA
9V
2590 RPM
25 dBA
8V
2100 RPM
19 dBA
7V
1680 RPM
14 dBA
6.5V
1150 RPM
12 dBA
Measuring mic positioned 1m at diagonal angle from the center of the heatsink.
Ambient noise level: 10~11 dBA.

The Vanxie's stock fan is quite loud, measuring 33 dBA@1m at full speed. Its noise is comprised mostly of turbulence at 9V~12V but there is a slight, underlying whine that becomes more noticeable as the fan speed is decreased. The fan doesn't start to become quiet until the 8V level and comes close to being inaudible at 6.5V.


At 8V, the Vanxie stock fan generates 19 dBA@1m. The spectrum shows a few more tonal spikes than the Scythe fan above.

The fan's acoustics aren't great, but certainly better than what one would expect from a stock fan from a lesser known manufacturer. It does sound a bit rougher than the Big Shuriken 2's fan when set to produce similar noise levels.



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