The microcode also improves PCI-Express bus stability and interoperability. Check out your motherboard’s download page for the latest updates.
Taken from TPU … AMD formally announced its AGESA ComboAM4 1.0.0.5 microcode. The new microcode is intended to be encapsulated into motherboard UEFI firmware updates and distributed by motherboard- and OEM desktop manufacturers, at their discretion. AGESA 1.0.0.5 improves POST (time) with select Micron Technology DDR4-3200 memory chips. An intermittent virtual memory error with certain Realtek onboard Ethernet PHY chips has been fixed. The microcode also improves PCI-Express bus stability and interoperability, in general. A PCIe lane configuration issue with Ryzen 3 Pro 2100GE has been fixed. Besides these, all other performance- and stability-improvements part of older 1.0.0.4 a/ab/abb/abba microcodes are incorporated into 1.0.0.5. Keep an eye on the BIOS updates section of your socket AM4 motherboard’s product page on its company website.