I have an Asus Prime B350+ mainboard, and I chose it because it was the ONLY Asus Ryzen mainboard with regular PCI slots on it. I have my R7 1700 OC'd to 3.8GHz and RAM @ 2933. System is 8 hrs Prime95 w/AVX stable. I stopped it after 8 hours, because IMO 8 hours in testing is good enough. I am admittedly liquid cooling the chipset and VRMs on this board though, and it is running Windows. I realize this is a Linux thread, but I've had no problems at all with my B350 chipset mainboard and overclocking an 8 core CPU. And this system just finished a 4 solid day video encoding marathon with the CPU pegged pretty much the entire time. I decided to re-rip and re-encode a bunch of my BluRays at a higher bitrate now that I can see banding in some of them on my new 4K TV (Movies are stored on my home NAS so I can keep my disks safely locked up. Children...).