Not quite. The v3 introduced the new PCB layout that allows for the second NVMe SSD via the daughter board. The v4 was just a v3 with the intel i225 nics updated to the i226. In line with what @dazagrt said.I would assume the feature to look for in order to determine the version is the possibility to install 2 SSD ( 2nd one via a small passive pcb)
Am I right ?
Again, shout out to @dazagrt. There is only one clock signal available between the m.2 and PCIe slot. It appears that all Samsung drives require a clock signal.I've finally received/tested JMB585 based SATA port adapter.
Good news is that it is working and ads 5 STATA ports. I was able to boot Ubuntu from SSD connected to port adapter.
Bad news is that it is not compatible with Samsung NVMe disk (980)
So I would like to ask if anyone has experience running V3/V4 with 2 NVMe's?
What brands/models allow to run 2 NVMe's simultaneously?
In your case it would seem that the JMB585 adapter also requires a clock signal so they will not work together.
I have found that the Seagate BarraCuda 510 range does not require a clock so should work. I'm not sure what other drives people have got working.