Need help with storage config - please read me - pretty please

[kevinmeder27]

For gigabyte motherboard GA-Z270XP-SLI:
http://download.gigabyte.us/FileList/Manual/mb_manual_ga-z270xp-sli_e.pdf

I would like to have just 2 drives. One mainly for the OS and random programs....and the other be more for games / picture storage. The MOBO only has 1 m2 socket, and if I understand it correctly if I use it, I lose some SATA connection ports, but hats fine. 

This is the M2 500gb stick I currently have (with a PCIe adapter if I go that route with it). 
https://www.amazon.com/dp/B07BR9FV1C/ref=cm_sw_r_cp_tai_Ku2YBbV8CXZ5S

In your opinion should I be using that stick in the PCIe slot and (for game storage etc)....and then use a standard 250gb SATA ssd (for this I already have the Samsung 860 eco NAND) for my OS (win 10 x64)?

I *think* the M2 SSD is faster in the PCIe slot rather than the M2 socket in the MOBO...but I have read so much stuff lately I am not sure anymore. I just know I want a fast boot to fully loaded windows...

I appreciate your thoughts...

 

[USAFRet]

Put the WD Black in the m.2 port. It will run at its native fastest speed.
Use that for the OS and applications, and maybe a game or two.

Use the 860 EVO in a regular SATA III motherboard port for whatever else.