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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)
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