Hi Mark
Had you fixed the problem? I think i miss the same problem with you. But i think is not the ddr configeration problem.
Because winPE on scard can run up and install the win10 IoT to EMMC, and the os in emmc can running up,but no display.
I think it's the display problem, I want change to HDMI output, but I don't know how to change.
Regards