Correct. That's it. My mistake about it allowing it to boot NVMe. Also, it doesn't yet work with macOS Sierra.
I recommend going to barefeats.com for info regarding this subject. Rob, who runs the site is on top of this topic and he's also very friendly. He answers emails and might be able to help you locate whichever SM951s you want.
Like I said, I'm quickly buying ACHI SM951s off of ebay before sellers get hip to our desperation!
I have a lot of experience with these SSDs.
1) I recommend looking at the Amfeltech PCIe m.2 carrier cards. I have the Squid with four SM951s in a RAID 0. Read speed is an amazing 5700MB/s!
2) Consider purchasing Disk Sensei from
Condori (the makers of Trim Enabler). It has a manual TRIM feature which is handy when buying used SM951s.
3) If you're going to RAID your SM951s consider SoftRAID. They swear up and down that Apple's RAID driver does not support TRIM in a RAID. I'm not sure if this is true or not.
4) SM951s tend to get hot. And when they heat up the write speeds slow down dramatically. Either add a small heat sink to the blade or get something like iStats which lets you turns on all the fans for a predetermined amount of time. This works well in cooling down your m.2 SSD as well as your CPUs and graphics card. I turn all the fans on because I like lowering my 12-core Xeon down when needed.
Nothing beats those SM951s! They're the best for cMPs.
