A SSD boosted my FPS by a lot. Just whatever you do, DON'T use Shadowplay on your SSD. Keep that on your HDD.
I use my SSD for my OS system and some games/programs that I use a lot. I also have the 250GB Samsung EVO.
Keep in mind that a SSD is smaller then a HDD. So you either need a "SSD Desktop Holder" or leave it hanging in your pc.