Fan Roundup #5: Attack of the 120 Scythes

Fans|Controls
Viewing page 3 of 6 pages. Previous 1 2 3 4 5 6 Next

SCYTHE SLIP STREAM SY1225SL12H

Ambient noise at the time of testing was 18 dBA.

Brand Scythe Power Rating 0.41A
Manufacturer Scythe Airflow Rating 88.11 CFM
Model Number SY1225SL12H RPM Rating 1,600 RPM
Retail Availability Yes Noise Rating 33 dBA
Bearing Type Sleeve Header Type 3-pin
Hub Size 1.41" Starting Voltage 4.2
Frame Size 120 x 120 x 25 mm Number of Samples 6
Weight 120g Variance Noted None
Voltage
Noise
RPM
CFM
12V
32 dBA@1m
1460 RPM
61 CFM
9V
29 dBA@1m
1250 RPM
47 CFM
7V
24 dBA@1m
1080 RPM
40 CFM
5V
21 dBA@1m
890 RPM
30 CFM
20 CFM test not conducted because fan stalled before slowing enough.

The high speed Slip Stream had a smaller range of noise and airflow levels. It never spun slow enough for use in a silent system. We were suprised that between 9V and 5V, it was significantly louder than the Super High speed variant. Throughout its range, the noise of this fan was was smooth and fairly benign. At high speed there was a lot of turbulence, but relatively little whine. It is a high quality fan, but it doesn't meet our standard of silent because it is not capable of running slowly enough.

The noise to airflow ratio was more or less the same as the Super High Slip Stream. Undervolted to approximately the same noise level, they perform similarly.

Noise Recording

  • Scythe Slip Stream SY1225SL12H — 5V-7V-9V-12V with 5s ambient between each level: One meter

SCYTHE SLIP STREAM SY1225SL12M

Ambient noise at the time of testing was 18 dBA.

Brand Scythe Power Rating 0.26A
Manufacturer Scythe Airflow Rating 68.54 CFM
Model Number SY1225SL12M RPM Rating 1,200 RPM
Retail Availability Yes Noise Rating 24 dBA
Bearing Type Sleeve Header Type 3-pin
Hub Size 1.41" Starting Voltage 2.4
Frame Size 120 x 120 x 25 mm Number of Samples 4
Weight 120g Variance Noted None
Voltage
Noise
RPM
CFM
12V
28 dBA@1m
1210 RPM
46 CFM
9V
24 dBA@1m
1030 RPM
37 CFM
7V
21 dBA@1m
890 RPM
30 CFM
5V
~18 dBA@1m
720 RPM
24 CFM
@20 CFM (4.0V)
<18 dBA@1m
620 RPM
20 CFM

The Medium speed Slip Stream is probably the most sensible choice among the five. It spins reasonably fast at full speed and undervolts well, becoming effectively inaudible at 5V. It also has a very low starting voltage of only 2.4V. What impressed us most was how smooth and consistent the fan sounded, no matter what speed it was running at. At high speeds, a typical sleeve bearing fan drones and whines, and at low speeds it ticks or chatters. We listened very carefully for increasing and decreasing bearing/motor noise as the speed was adjusted, and the difference was minimal.

As for performance, well, it was simply the best. Of all the fans we've tested at approximately 18-19 dBA, none could match the 24 CFM the Slip Stream M pushed, not even our reference Nexus fan. Interestingly, according to various reports, the Scythe Ninja Rev. B now ships with this exact fan model. Some heatsinks do not even come with fans, so for Scythe to include their best fan with the current Ninja gives us all sorts of warm and fuzzy feelings.

Noise Recording

  • Scythe Slip Stream SY1225SL12M — 4V-5V-7V-9V-12V with 5s ambient between each level: One meter, at 20 CFM (4.0V)

JUMP TO:



Previous 1 2 3 4 5 6 Next

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