They played on a B450 Tomahawk Max II with Ryzen 7 5700x and the latest BIOS update from the last date listed on the MSI website, and it wasn't even on the motherboard's QVL. However, I took the risk because it had a similar kit that had RGB and I didn't choose it, and in the end, I went with this one. After running Memtest86 for 4 passes for 7 hours with XMP enabled, I didn't encounter any problems with these specific memory modules. The price was very good, I would say around 100 euros, and it's Dual Rank CL-16-20-20-39 Hynix CJR, especially if you want XMP to work consistently and don't want to mess around with timings and do the job. I would say it's a very good choice.

I got it to replace a 2x8 G.Skill 3600C16 in combination with an AMD 5900x and Crosshair VI Hero motherboard. Although I read that some people had issues with this specific kit, everything went smoothly and it worked right away. I haven't noticed any difference compared to my old RAM, even though it had slightly better subtimings.