Need help to choose between M.2 or SATA 3 SSD

[i.adeelmumtaz]

I have a dell inspiron 5567 with 1TB mechanical hdd. I am planning to install an ssd of 128GB and set it as boot drive.
Now as this laptop do not have M.2 slot, i have an option of using a M.2 caddy to install M.2 SSD in either optical drive slot or internal hdd area.

I need suggestions to choose between M.2 SSD ( like Samsung EVO 960/970) or a 2.5'' SSD ( like Samsung EVO 860). In either case, my selected drive will be used just for booting.

Keep in mind, I dont have a M.2 slot, i will use a M.2 caddy.

Thank you in advance

 

[faalin]

Ether or, M.2 in a caddy or SSD will run at SATA 3 speeds just because of the location it is plugged in to the laptop.

 

[i.adeelmumtaz]

Ether or, M.2 in a caddy or SSD will run at SATA 3 speeds just because of the location it is plugged in to the laptop.

A normal SSD will not achieve the theoretical SATA 3 speed of ~750MB/sec, will a NVMe SSD achieve ~750MB/sec when plugged into SATA 3 port using an adopter, converter or caddy?

 

[rgd1101]

if it use sata3 port, it will limit to sata3 speed

 

[i.adeelmumtaz]

ok. thank you all for the clarification