User Guide

Selecting Audio and Video Devices for Use with Polycom PVX
2
Determining the CPU Load for Your System
Polycom PVX is a CPU-intensive application. It was originally designed to
accommodate the CPU requirements of third-party video capture devices, so
that the total CPU load results in acceptable performance. As modern devices
have become more capable in resolution and supported features, they have
sometimes also become more CPU intensive. Using some of these devices can
cause the total CPU load to surpass optimal levels. For these CPU-intensive
devices, you can adjust the PVX CPU requirements to accommodate the
device’s requirements.
The following table lists the CPU load levels for some of the video input
devices supported by PVX. You will need this information to configure your
device. If your input device is not listed here, refer to the information which
follows this table.
This device...
Uses this CPU load
level...
AVerMedia AVerTV GO 007 FM Plus PCI Low
Creative WebCam Live! Motion High
Creative WebCam Live! Pro Medium
GlobalMedia iREZ KD 1394 Low
GlobalMedia iREZ K2 USB 2.0
Note that the GlobalMedia iREZ K2 USB 2.0 camera was
tested using quality setting B (the default setting). Higher
quality settings offer additional image processing capability,
but the increased load on the CPU may adversely affect
system performance.
Medium
Logitech QuickCam for Notebooks
Pro
P/N 961398-04030
Driver version 9.5.0
High
P/N 961240-04030
Driver version 8.4.1
Medium
Logitech QuickCam Pro 4000 Driver version 7.3.0 Low
Driver version 8.4.8 Low
Driver version 9.0.2 Medium
Logitech QuickCam Pro 5000 Driver version 9.0.2 Low
Logitech QuickCam Fusion
Note that, as of driver version
9.0.2, the Logitech QuickCam
Fusion audio echo canceller
appears to add delay and
introduce audible artifacts into the
audio.
Driver version 9.0.2 Medium
Note: If the Logitech
Audio Echo
Canceller (AEC) is
enabled, select
High.