That´s not that much information you are giving.
But in general:
- An SSD does not increase FPS in any noticeable way. But in decreases loadtimes (if the games are installed on the SSD of course) and improves the general smoothyness (<-- is that a word) of your OS. But since you only seem to be interested in a 64GB SSD, you probably won´t be able to install your OS AND games on the SSD anyway.
- For modern games you really should have 8GB of RAM for them to run smooth. You don´t really need 16GB (yet) but 8GB is recommended.
- RAM clock speeds don´t improve FPS that much. We are talking about maybe 5FPS difference at max. in games between 1333 and 2133 RAM.