So if i were to install a 8GB USB stick and put it all into RAM it wouldnt really make my MC Server Faster?
I would recommend setting up a different desktop computer on your network to run minecraft.
That way your whole PC is not doing everything and getting raped.
I have a bunch of half-useless, old family PCs lying around that I set up for dedicated servers sometimes.
(Be sure to limit your upload and download limits on your router so you and your server are in equilibrium.)