Changes like this do require your computer to have enough processing power to work with these graphics, and a video card capable of running it is fundamental as well.
And this one is the most complete of the bunch as it aims to better the way in which every single item in the game looks.
All the old maps in FFXIV had been touched up and all the rough edges smoothed out with the multiple naughty bits sharpened up too.
This mod aims to stabilize the FPS by improving processing.
It's set in the formerly closed off country of Ishgard, home of the Dragoons, as well as the nation's long-time opponent, Dravania; its main story shines some light on the history of fierce war between humanity and dragonkind that has been raging in Eorzea's north for centuries.
Worth a try to see what you think.