The default Gauge Timeout value that controls the refresh rate of Saitek’s Flight Instrument Panels (FIPs) inside SaiFlightSimX.xml file is 100. Lowering the value could bring some improvements to the smoothness of the display on the device.
However, setting the value too low or at 0 could inversely impact not only the FIPs but also the performance of FSX.
I found 50 a good start and 20 a good balance. Your mileage may vary, of course.