PCIe M 2 Adaptor

Review and Benchmark of a Inexpensive PCIe 4x Dual M.2 Adaptor
There are many generic PCIe M.2 adaptors. This PCIe4x card allows for both SATA and NVMe protocol M.2 SSDs at the same time. This one is a bargain.
00:01 Intro
00:40 What's in the Box
02:55 Assembly
04:42 Install the Drives
07:48 Detect the Drives in the BIOS
08:51 Format the Drives
10:34 Benchmarks
14:12 Conclusions
It can be found at www.amazon.com...

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How to make it the boot drive?