If it still does not work out, please contact with Joytech technical team. To update VGA driver is not useful generally. You should check out two places to make sure it is opened. In this tool, you can switch this function between enabled and disabled. To make it disabled will shut down 3D engine and apply software emulation instead.
Most games provide the option to select hardware acceleration or software emulation.
Please refer to the user manual of a game to know how to enable hardware acceleration in order to get the benefit of a 3D engine. Final Fantasy VII used RGB888 format as its default setting that 6326 VGA card does not support. Please change the setting to RGB555. Then, the game can run normally. Make sure that you have the newest driver for your 6326 VGA card to run any Open GL supported games.