There are two versions of the game, one for Win95 and one for DOS.
The DOS version of the FIFA '97 DEMO requires a minimum of 8MB of RAM to run. While there is no performance increase to be gained from having more memory, you may find that you experience more sound effects and that the game loads faster.
The Windows '95 version of the FIFA '97 DEMO requires a minimum of 16MB of RAM to run. If there is more memory available, you should experience better game performance in all areas. The Windows 95 version also requires DirectX drivers.
The DOS version of the FIFA '97 DEMO will NOT run under Windows '95 and vice-versa. This CD browser will attempt to detect which Operating System you are using and run the correct version of the game automatically. If you have difficulty (under Windows 3.x you may have more success from pure DOS) then you can run the appropriate version manually. Refer to the "ReadMe" tab for the original instructions from Electronic Arts. The ReadMe tab also has details of controls etc.