National Instruments PCI-8430 - Page 186

WhyamIseeingpoorperformanceonWindows
XPwhenIusemultipleUSBserialinterfaces?
WindowsXPsystemperformancemaybereducedwhenmultipleUSB-
232andUSB-485devicesareinstalled.Thiscancauseslowscreen
updating(mouseandwindowmovements)andreducedtaskswitching
performance.ThisproblemisaddressedinWindowsXPServicePack1.
ToobtainWindowsXPServicePack1,useWindowsUpdate,orcontact
Microsoftatwww.microsoft.com.