EDIT :
Moderators : If & When I get the Sierra Sandisk-960 EVO fusion working I'll remove my Sierra posts here to the Sierra thread. ( Got carried away with this project

)
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Step #1 done. Appears in Sierra 10.12.6. Not bootable yet
View attachment 759901
Next step will be to create a Sierra fusion drive with my current boot drive which is a Sandisk 480 Gb SSD
running on cMP SATA II.
I still feel amazed that a 9 year old Mac Pro 4,1 2.93Ghz Dual Quad (upped to 5,1) is mostly keeping up with the world.
And definitely still very useful.
Let's hope that future upgrades to Hi Sierra or OS 10.14 will finally allow NVMe booting, surely at least some of the High Sierra development team visit Macrumors and see what we are achieving
WITHOUT their help

.
( . .. or ..
do some help us under aliases ? Hmmmm ).
They must feel at the very least a little admiration for those talented and insightful cMP owner/members accomplishments. And perhaps . . some actually own cMPs too . . . .
cMP owners are not asking for much . . just a few lines of code.
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h9826790
I'm just curious .. . I suppose that there is no point in putting my NVMe PCIe carrier in PCIe slot 2. ?
Currently it is in slot 4