Mac (Retina 5K, 27-inch, Late 2014)
11.4 Big Sur
Now I am using an AKiTiO Thunder 2 Box with an INTEL 750 PCIe SSD as external hard drive to boot the macOS.
But the I/O performance is really disappointing, the link speed is only 5.0 GT/s and width is x2.
According to https://www.akitio.com/blog/articles/nvme-vs-ahci-pcie-ssd, the performance should be much better.
I tried reset PRAM but no luck. Help me please.