I have a 2tb caviar green 3.0gbs drive (5400rpm) and I have a 160gb 3.0gbs (7200rpm) drive. Everything is currently installed on the 2th drive. Should I move the OS to the 160gb drive or will I not notice a difference at all? Thanks!
I would almost guess that the newer "slower" drive still has an edge. That said, if files are kept close to the outer edge of the large drive, you will also improve access times(does not show up on benchmarks, but it should help).
Now a modern Black or even Blue would crush the GREEN drives.