I have an AMD 1800+ with 1.5Gb RAM a 128Mb 3-head AGP video card using Win 2000 running my Labview 7.0 application at 9-11 loops per second. I also have a P4 HT 2.8GHz with 2Gb RAM a 128Mb 4-head AGP video card using Win XP running my application at 5-7 loops per second.
All available benchmarking software shows that the newer system is much faster but the application (data acquisition and online calculations) is still slower. Exchanging the video cards makes the new system a little faster (9-11 Hz) but not approaching the speed I though I would get (30-40Hz) with the faster CPU. Disabling HT makes no difference and profiling the VI indicates that the sub-VIs (hence the majority of the calculations) take very little time and removing the large graphs and charts from the front panel speeds up the loop rate considerably (>100Hz). Hence I though that it was a video card issue (i.e. the new card was not fast enough to display 3 screens simultaneously) however the is no speed difference between using a 64Mb PCI video card and a 128Mb AGP card indicating that it may not be the video card. I believe that the problem is related to the computer hardware but the computer technicians say that it may be something to do with LabView. Does anyone know what the problem might be?
