I recently built a system with the Ryzen 1600, and Gigabyte AB350 Gaming 3.
Due to issues getting my original RAM running at 3200mhz, I upgraded to G.Skill Flare X 3200 16cl (F4-3200C14D-16GFX).
I was ecstatic to see my memory running at 3200 by simply setting XMP profile in BIOS!
However, now I'm having another (more serious) issue. My PC is only recognizing 6 cores.
That is, it previously displayed "6 cores, 12 threads/logical processors", and it is now dispalying "6 cores, 6 threads/logical processors".
This (obviously) heavily impacts performance benchmarks.
Where did my (virtual?) cores go!? Please help.
EDIT: I noticed Ryzen Master was the cause of some missing core oddities throughout this forum, but I do not believe I have it installed, so seems not to be the cause of my problem.
EDIT 2: I can also confirm that SMT is set to "auto" (Where options are "auto" or "disable").
EDIT 3: Hard reboot (unplug, wait, restart) seems to have resolved the issue. Hopefully everything remains good.