If you run the game at 3440x1440 (21:9) with the standard fix, the will look perfect, but the menus will be stretched or show duplicates of 3D elements.
To properly enjoy on modern hardware, the Widescreen Fix (often referred to as the Generic Fix or Fusion Fix ) is essential. It doesn't just stretch the image; it corrects the aspect ratio, scales the HUD, and fixes several critical bugs that make the game unplayable on newer versions of Windows. Core Features of the Fix need for speed prostreet widescreen fix