Scythe Ninja 3 & Scythe Yasya CPU Heatsinks

Cooling
Viewing page 6 of 8 pages. Previous 1 2 3 4 5 6 7 8 Next

Stock Fan Measurements

Specifications: Scythe 3 & Yasya Stock Fan
Manufacturer
Power Rating
7.2W
Model Number
SY1225SL12HPVC
Airflow Rating
110.31 CFM
Bearing Type
Sleeve
Speed Rating
1900 RPM
Corners
Open
Noise Rating
37 dBA
Frame Size
120 x 120 mm
Header Type
4-pin PWM
Fan Blade Diameter
114 mm
Starting Voltage
4.1V
Hub Size
36 mm
Weight
120 g
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
1920 RPM
36 dBA
9V
1580 RPM
30 dBA
7V
1350 RPM
26 dBA
5V
1030 RPM
18 dBA
4V
800 RPM
13 dBA
Measuring mic positioned 1m at diagonal angle from the intake side of the fan.
Ambient noise level: 11 dBA.

The Ninja 3 and Yasya stock fan has a much higher speed than the fans on most of Scythe's previous coolers but it is still a Slip Stream, so smooth, unobtrusive sound can be obtained through undervolting. At 9V and above, the fan produces a distressing amount of whine and turbulence. At 7V the whine lessens, but the turbulence remains, and the fan gives off an audible hum. At 5V, the fan becomes what we consider to be quiet — 18 dBA@1m, with a smooth broadband profile with just a slight rattle audible at one meter. At 4V, its acoustics are beyond reproach; there are few fans if any that sound as good generating 13 dBA@1m.

The fan has a starting voltage of 4V, which is also the bottom limit of the included fan controller. However, when combined with PWM control on a capable motherboard, the speed can be dropped down to about 400 RPM, though there is little practical reason to slow it down that much.


The Ninja 3/Yasya stock fan measures 18 dBA@1m when running at 5V.

COOLING RESULTS

Stock 120mm fan
Fan Voltage
SPL@1m
°C Rise
Ninja 3
Yasya
12V
36 dBA
39
36
9V
30 dBA
40
37
7V
26 dBA
41
38
5V
18 dBA
44
40
4V
13 dBA
46
43
Reference 120mm fan
12V
16 dBA
44
41
9V
13 dBA
47
43
7V
12 dBA
49
47
2 x Reference 120mm fans
12V
19 dBA
41
39
9V
14 dBA
43
40
7V
12 dBA
46
43
°C Rise: Temperature rise above ambient (26°C) at load.

When paired either the stock fan and our reference fan, the Yasya consistently held a 2~4°C lead over the larger Ninja 3. Though the Yasya has a less impressive mounting system, we found that the thermal compound footprint (examined when the heatsink was removed after testing) showed signs of a tighter mating, and was more even all around, probably due to its slightly convex base. We believe this played a significant factor in the Yasya's superior performance.

Pairing the heatsinks with dual reference fans produced similar improvements with a 2~3°C drop in temperature at 12V and a 3~4°C dip at 9V and 7V.



Previous 1 2 3 4 5 6 7 8 Next

Cooling - Article Index
Help support this site, buy from one of our affiliate retailers!
Search: