Since before the launch of Ryzen, we knew that DDR4 compatibility was one of the weak points of AMD's new processor lineup. At the time, it was promised that we'd get a microcode update to enhance DDR4 support and that this update was one to two months away.
Now HotHardware reports this highly-anticipated AGESA update for Ryzen is getting close to completion and that motherboard makers like Gigabyte are hard at work on a beta BIOS that will address this issue as well as other problems:
A representative for Gigabyte has been relaying information back and forth between forum members at Overclockers UK and Gigabyte. In one of his most recent posts, he indicated that Gigabyte's team is hard at work on a beta BIOS update that will address several issues. They include the following:
For those looking for IOMMU fixes we are hopefully going to have an option to force boot off a specific PCIe slot. It's not the grouping fix, but a work around for now.
Disable LAN (per request)
Disable Audio (per request)
"ROM Image update" (Being worked on with AMI, no ETA)
Cold boot / Won't boot. Have to re-flash BIOS. (people have referred to this as "soft brick")
AGESA 1006 - improve memory (Got high hopes for this one. Going to enable 20+ memory register)