When switching to 3D mode, the simulation becomes slow even though I have a good graphics card. What can I do to get the best performance?

On computers with both an on-board graphics card and a dedicated graphics card, the graphics mode needs to be explicitely switched to the dedicated card for best PTV Vissim performance. This can be done in the Nvidia Control Panel or AMD Catalyst Control Center, which can be accessed from the system tray in the Windows taskbar or from the advanced settings in the display settings from the Windows Control Panel.

If a computer has Nvidia Optimus, PTV Vissim is usually executed by default on the on-board graphics. To assign Vissim to the dedicated graphics chip, the graphics settings need to be modified as above.