Hello,
I have a very interesting issue. I bought a Ryzen 7 1700 and B350-Plus motherboard about a year ago, along with 16GB DDR4 RAM. Everything was working fine until a few days ago, in which both of my 8GB of RAM would detect and would show up, but only have 8GB, as 8GB was "System Reserved" RAM. Every slot works, but only when I put RAM in A1 and A2 or B1 and B2, only running in single channel. In A2/B2 (as the manual suggests) or A1/B1 doesn't work, just comes up as System Reserved and cannot be allocated
Thanks
EDIT: I have tried updating the BIOS, but that did nothing