Well its all relative but yes it would be worth it i would say, as long as you dont expect it to OC like say a 460 does. It will help a bit but it wont make a huge differance like putting it in a differant performance bracket or anything like that.
There are online guides and the pictures will help you get a better idea than reading a wall of text so i suggest you look for a decent guide online.
Mactronix