I\'m currently having a very similar issue with two different systems, trying to figure out how to stop the real slow framerate - I\'m stuck at between 5 to 7 FPS (my estimation).
First system:
Athlon XP 1600, 512MB RAM, GeForce FX, SBLive! 5.1 Platinum, WinXP
Second system:
K6-2 450MHz, 256MB RAM, GeForce2, SBLive! Value, WinXP
Both systems have the same framerate issue, and neither one is significantly affecting my network connection.