inspiring your M.2 > PCIe x16 > sff-8643 x8 > adapter nvme
each ssf-8643 can give 4 lane sata3.
I plan to try M.2 > sff-8643 > PCIe x16 > 4x1 bifurcation > JMB585 x2 > SSD Sata3
or 2x2 bifurcation > JMB585 x 2 > SSD Sata3
I’m a little afraid of the sff-8643 to the pciex16…