Hopefully a few of those that successfully got their S/D20 working are still monitoring this thread…
I recently purchased a D20 with Dual X5650 and 96GB of RAM!
I also bought a HyperX Predator PCIe SSD for it.
This has been a little frustrating for me. I am trying to install Sierra onto the SSD. The frustrating part is that the installation works fine! Using a basic Clover USB drive, I was able to boot into the installer, format the SSD (which it saw no problem), and then install OSX. However, after rebooting, I am simply unable to boot up on the SSD. I have tried everything, with no success. I know OSX can run fine on my machine (at least the installer), and I know the SSD works. Why can't I boot up?
Whenever I try to boot up on my SSD through Clover, it hangs at the same spot (picture below). I've looked at my successful boot logs when I boot off the USB drive, and the very next step is related to finding/mounting the boot disk. Specifically, the very next line is "Got boot device = IOService:...". This step works fine when booting off the USB, but doesn't work when booting off the SSD.
I've also tried to install OSX to an internal SATA HDD, and even to an external USB drive. All of these install fine, but, have the same problem when trying to boot up.
Can anyone provide assistance? I've done all the standard fixes to try and get it to boot (PCIRootUID, npci, -v, -x, etc.). I've tried playing with some BIOS settings but haven't found anything that works yet.