Will I have to re-install my OS if I get a new SSD

Arishok N7

Honorable
Aug 6, 2012
389
0
10,810
So right now I have a 120GB SSD and a 2TB HDD. I keep my OS and various other things on my SSD and everything else on my HDD. If I was to get a faster SSD, how could I put the OS on it from my other SDD? Is there an easy way to do it, or is the only way to re-install.