I have a flashed 4,1 running HS. I bought a Sabrent 2t NVMe off eBay. Read reviews on Amazon and several say it works. I am using an Inateck adapter but I got nothing. Anyone else have experience with Sabrent or Inateck?
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Resolved Sabrent NVME
- Thread starter Pecator
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check out this thread.... 
you need to make sure your on the right firmware.
forums.macrumors.com
you need to make sure your on the right firmware.
PCIe SSDs - NVMe & AHCI
This is a general info thread for blade SSDs that can be used in the Mac Pro. This is a WikiPost so anyone with the proper credentials may edit it. NVMe SSDs can be used as a boot drive in the MP5,1 and MP6,1 with the latest firmware installed (beginning with version 140.0.0.0.0 for MP5,1 and...
forums.macrumors.com
I am using the one attached, and it is working like a charm!
SABRENT NVMe M.2 SSD to PCIe X16/X8/X4 Card with Aluminum Heat Sink (EC-PCIE)
SABRENT NVMe M.2 SSD to PCIe X16/X8/X4 Card with Aluminum Heat Sink (EC-PCIE)
www.amazon.com
Personal experience with Inateck:
Their USB 3.0 PCIe cards are great and I've used in many MP4,1/MP5,1 machines. The KT4004 is/was the go to easy cheap way to add USB3 for a very long time.
I've used their SATA USB drive enclosures and had numerous issues with them. They stopped working in macOS after one of the OS updates around 10.11 or 10.12 and switched to another brand for that need.
Their USB 3.0 PCIe cards are great and I've used in many MP4,1/MP5,1 machines. The KT4004 is/was the go to easy cheap way to add USB3 for a very long time.
I've used their SATA USB drive enclosures and had numerous issues with them. They stopped working in macOS after one of the OS updates around 10.11 or 10.12 and switched to another brand for that need.