ZombiePhysicist
I am currently using this drive in an OWC Helios 3s and the only bottleneck is that the drive is running on PCIE 3.1 instead PCIE 4.0. From my research, I am yet to find a Thunderbolt enclosure with PCIE 4.0. Even the e-GPU ones aren't. Worth noting that using a generic StarTech U.2 card in the Helios yields same results as the OWC tray in the Helios.
I initially used the Sonnet as reference and realized that their chart was wildly inaccurate. At the time when I bought my drive, it said that Kioxia drives worked on Mac on that same chart and it also said the Samsung PM1733 worked as well (did not work via enclosure as stated in previous message). Maybe compatibility in that card is different from the enclosure but I literally have datapoints on Kioxia drives working fine for Mac both via PCIE in mac pro and via enclosure.
The CM7 is a drive I have considered as well because the speeds are frankly disgusting (in a good way) but it's worth noting that it is a PCIE 5.0 drive which is still fairly new in implementation and may open up another can of worms despite it theoretically being backward compatible with PCIE 4. Also Kioxia doesn't have the PCIE 4 performance of the CM7 in their datasheets. I just settled for the CD8 as my next drive.
Another note is that while sequential speeds are always beautiful to look at, I found that the single most important performance metric for all these enterprise u.2/u.3 nvme drives is Rand 4KiB Write in IOPS. It's the one stat that you will see real world gains in especially when using it as a boot drive.
Thanks for all that detail.
So I'm going to try to get an evaluation unit (or if I can more than one unit) to try to get to the bottom of what might work. Fingers crossed.