Reso :
If I put my OS on an SSD, will the OS run / load up a lot quicker?
Define a "lot" .... testing done on same box:
Boot time with Seagate 2 TB 7200 rpm HD = 21.2 seconds
Boot time with Seagate 2 TB SSHD = 16.9 seconds
Boot time with Samsung 256 GB Pro SSD = 15.6 seconds
Don't get me wrong, if you run storage benchmarks the SSD will kick tail. But if you are expecting a life changing experience, it just ain't gonna happen.
I'd recommend:
Get a SSHD with just about any CPU / GFX card combo .... if ya still have more money to spend.....
Get a better GFX card .... if you have a 780, 780 Ti or 290x and still have more money to spend ....
Get a betetr CPU .... if you have a 4790k and still have more money to spend, get a SSD.