Silicon Imaging SI-2K User Manual page 26

IMPORTANT:
Please note, that the software is designed for cross system use. That means
that functionality could exceed recording systems which are restricted in per-
formance. That makes the system futureproof in terms of upgrade options, but
the user has to be careful in choosing settings.
Inside SiliconDVR go to UTILITY MENU/CAM PREFS to access Recording
and View Settings.
Notes on CAM PREFS Settings:
Overall Performance and Stability of the System are depending on the Set-
tings you choose inside CAM PREFS. Especially Display Modes combined
with Resolutions and Framerates.
Confirm CAM PREFS with OK and EXIT UTILITY MENU to access RECORD
Button.
Notes on Fan Mode Settings:
FAN MODE 1 varies the fan-speed based on the processor temperature. So at
low temps, the fans run slower (and are quieter), and when the temps are hot,
they run faster. This mode is good to use when outside or in hot environments.
The processor has a protection mechanism that down-clocks the processor if
it goes over 100C. Also recording is disabled when you hit 100C. So there
are no worries about frying the processor (there is also a temp indicator in the
status bar that lets you know the temp of the processor).
FAN MODE 2 keeps the fans running full-blast when not recording, and quiets
them when recording. In fan mode 1, when it's hot, the camera does not get
quieter when you're in hot temps, but if you are in a sound-critical environment,

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 SI 2K Manual