Buildt my first pc using the asus prime x470-pro and the ryzen 5 3600. Updated the motherboard to version 5220. At first I could only get it to post with one stick of g-skill 3200 speed ram (posted and recognized both sticks when updating using an older am4 cpu). In an effort to troubleshoot and get it to post with both sticks I tried re-seating the cpu. After this I cannot get it to post at all with the r5 3600. Went back to the older cpu and got it to post just fine. What should I do here? I know I'll probably have to return something, seems like the cpu to me, but is it for sure the cpu?