I'm upgrading my laptop and instead of using a 120 GB Crucial BX500 SSD in place of the current HDD as a boot disk, I wanted to use an m2 SATA SSD. I understand some say the SATA 3 bus will limit the speeds of both to 6 gbps. However, I just need to know if I can plug an M2 120 gb SATA SSD directly into the HDD SATA 3 slot or will I need to purchase an interface caddy like one does for optical bays etc? Tks!