Mac Pro 5,1 booting Mojave from NVMe in PCIe slot 2. Adding 2nd NVMe to PCIe slot 3 and want to partition this ssd into ArchLinux/Windows10. Is this possible? I've done searching around and a little confused as to whether it is possible or not. If it's possible, I have an RX590 so I do not get boot screen. So I have no option to choose startup disk, in this case how would I choose the system to boot into? I was thinking of making 2 MS-DOS (FAT) partitions for Linux/Windows to live there, but when I opened boot camp assistant it tells me that it is not available on my computer. Is this because I'm using NVMe as boot drive or a limitation by Mojave or specific to my Mac Pro? I do have an internal SATA SSD that has High Sierra, and it seems like it will allow me to create a boot camp partition. The issue there is that my video card (RX590) seems a bit flaky on High Sierra so I'm not too keen on using that for the install process. I do still have the original video card that came with the machine so I can use that for the install. Any input or feedback?