My motherboard isn't rated for more than DDR4-3200 with my old cpu, a Ryzen 7 2700. I could set my memory's XMP profile up and run at DDR4-3466 and memtest would be stable for more than 24 hours but would error before 48. I backed off, DDR-3400, DDR4-3333, DDR4-3266... finally stable in memtest for 96 hours, boot into Windows and run Prime95 Blend workload, 3266 crashes in hours. I finally find a little note in my motherboard manual that older CPUs are limited to DDR4-3200. Set that speed, rock solid, I was even able to tighten the JEDEC timings with guidance from the second XMP profile for DDR4-3133.

Gigabyte really did mean DDR4-3200 was the limit for Pinnacle Ridge and older AMD cpus.