Will NUC515RYH BIOS support the new Intel 750 NVMe SSD?
If so, will it be able to boot from it?
Also, which connector version with work with this NUC?
I would recommend that you check on the following web article from Anandtech, very complete:
The NUC5i5RYH wont be able to accommodate this drive, the PCIe version is for obvious reasons not supported and the regular version uses the interface SFF-8639 to connect to the board which in this case is not available on the NUC5i5RYH.
I hope this helps,