Sorry, I missed the initial post. I am using Samsung 980 1TB NVME M2 SSD on a ICY BOX PCI-E 4.0x4 1xM.2 NVMe with ZFS as my root pool, works like a charm on old 2013 mainboard where only SATA is available.. just note that maximum chipset efficiency will be the bottleneck but with a good chipset it may be faster than SATA :-)
-- CeDeROM, SQ7MHZ, http://www.tomek.cedro.info
