Hello all, I am having an odd issue with my new motherboard/system. I just swapped out my Threadripper 1950x and Gigabyte x399 Aorus Gaming 7 motherboard for a Ryzen 3900x and Gigabyte x570 Xtreme board. So far, I have no issues with the performance. I have not done any overclocking, and everything has been stable without any crashes. Here is my full parts list vis PC Part Picker: https://pcpartpicker.com/b/BqHhP6 I have installed the latest Bios version; F10; from Gigabyte's website. I also have downloaded the latest chipset drivers and individual drivers for all the components that are Windows 10 1909 supported (as the Windows version I am running is 1909). One 3 known occasions now, my system has powered itself back from a full shutdown state. I powered it down before heading out for a bit the other morning. and when I came home it was powered on. When I logged into my main user account, task manager said system up time was 4 hours and some change, which meant it kicked back on shortly after I had powered it down. Last night I had done a full shut down, and while working on another build for a friend, my system powered itself back on. This time I actually saw it do it. At this point, I started researching what could been causing it. Here are some steps I have taken to try to prevent it from doing it. In BIOS, I double checked to make sure fast boot was off, which it has been since I installed the BIOS. I turned off 'Wake Up On LAN" after the first time it turned itself back on, but the issue continues. Since it turned back on last night, I have gone into Windows Power Settings and changed the following under the Sleep tree: -Sleep After: Never -Hibernate: Never -Allow Wake Times: Never I also went into device manager and turned off 'Allow this device to wake PC" under the mouse and keyboard settings. After I made this changes, I clicked on the start icon, and click 'Shut down". It shut all the way down, and I tapped on my keyboard and mouse a little bit to make sure they where not going to trigger a boot up. It stayed powered down, and I left the room. Later on when I came back to the PC, and it was booted up again and task manager said it was up almost 4 hours, which means the system stayed shut down for about an hour and a half, if that, before it booted back up. Does anyone have anything else I could try? I would just keep the kill switch off for now, but I really don't want to do that. I know the Ryzen 3900x and x570 is still relatively new and there is not a lot about this board online yet. I have not attempted to contact Gigabyte yet.. That's my next step on Monday when they have support lines open.