Hi- I'm upgrading my 2009 MP's aging hard drive RAID finally. Replacing the boot drive with a PCIe SSD (m.2 card in a PCIe holder). I've zeroed in on the new Samsung 950 PRO (mfr. site | amazon), which is the new mass market version of the famous SM951. 950 PRO uses 3D VNAND and NVMe, and ships next week supposedly. Which PCIe card can I get that will give me NVMe booting support with the 2009 Mac Pro under El Cap.? Lycom's website says its DT-120 PCIe adapter supports NVMe... can anyone confirm this? That would be great because it is only $28 at Amazon. But I'm hesitant because of this Apple discussion thread that says MP 5,1's EFI will not allow booting via NVMe devices. I don't know if they tried under El Capitan, or if that would make a difference. I realize there won't be much difference to the older SM951, but it seems hard to find and is priced at $469 on NewEgg.com as opposed to the 950 PRO for $349.99. RamCity through Amazon SM951 for cheaper but they are based out of Australia, and I don't know how I feel about buying OEM components internationally. Thanks! EDIT: I found some more threads claiming NVMe won't boot on cMP. WTF Apple?! We better organize for a firmware update. This is a travesty! But I see no word on this from Apple's own support website. How do we know it's not just from an incompatibility with the current PCIe cards? Has anyone tried other brands than Lycom to see if it makes a difference?