yeeeah, Fianl failure had some CRAZY requirements, and some massive textures.
here, let me try to simplify, yet complicate my explanation.
Lets say you set the graphics to maximum. then you've got the biggest draw distance, and ever model in the game, be they characters or props use textures that are a minimum of 1280X1280 in resolution size. EVERYTHING is smoothed and anti-aliased, and every time you turn around you run into particale effects, volumetric lighting, bump-mapping, and shadows. oh GLORIOUS 3d high-res shadows.
and it mulches your system requirements.
if you've got a machine like mine, then your pc won't even break a sweat.
Lets say you turn the graphics all the way down. the game loads the low res, semi-jagged character models. dose not smooth anything, r only minimal things. no anti-aliasing, SIMPLE shadows (a single black dot below the character, Rectangles for objects, etc) Simple lighting, little to no particle effects, and VERY LOW RES textures, such as 128X128. in addition, your draw distance will be turned WAAAY down.
Beleive me, You should have no trouble.