why would a overclocking be necessary?
im a noob in this
It's for 2 types of things mainly.
1) If you have an aging computer that you want to get the most life out of. OC'ing can save you a lot of money, granted the first time around IMO you do not because the time investment tweaking testing etc usually outweighs just going out and buying a new pc... but it can make the difference between FFXIV @ 15 fps or 25FPS.
2) Enthusiasts love seeing how fast their pc can go... but that doesn't apply here.
Plus the whole process can be rather fun. When you see that computer you've been sitting by doing much more then it ever did before, it's quite exciting. I remember when i first overclock my radeon 7500, i was so happy it was going faster and giving me that little boost in games.