Hp 590-p0053w
16 gig optane memory/ 12 gig ram 1 t hdd/ 500 gig sdd
windows 10 pro 1903
I pulled the optane memory out of the m2 slot and replaced it with a 500 gig m2 evo.
Added another 8 gig stick ram to boost to 16 gig.
unplugged the hdd and restored an image using Macrium on to the m2.
Worked like a charm . Didn't even have to reactivate it.

One thing if changing the m2 USE a magnetic screwdriver as the screw is tiny.