XFX 650I - Manual (Page 107)

Using NVIDIA Software
93
Performance
The Performance option on the Networking Control Panel Categories screen
provides the means to configure FirstPacket settings and to set TCP/IP
acceleration configuration.
Figure 28. Networking Control Panel Categories
First Packet
NVIDIA FirstPacket offers a new way to manage the traffic on your personal
computer, allowing you to more effectively manage and improve the
performance of networked games and other applications that are sensitive to
network delay (latency), such as Voice-over-IP (VoIP).
FirstPacket creates an additional transmit queue in the network driver so that
network applications can share a limited resource. Based on user preference,
FirstPacket can expedite transmission for user-approved network applications.
For example, when FirstPacket is enabled:
A game that was previously unplayable can be completely usable
VoIP connections will not be dropped due to the network traffic on a local
computer.