I recently got myself some Crucial Ballistix Elites (3200 15-16-16-35 1.35v - A2 PCB) but for some reason they wouldn't work on my Z390 Gaming Pro Carbon and 9600k. More details on that here.
I wasn't 100% sure what ICs they used and I couldn't get them to boot so I went ahead and unscrewed the heatsink. I tried prying at the edges in hopes that I could make out the label on the RAM chips, but I slipped and 1 SMD flew off. The one next to it is pushed over a bit as well. :/
I was able to downgrade my BIOS using my existing sticks and the Ballistix Elites worked. I confirmed with Thaiphoon Burner that they were B-die so that's a plus. Unfortunately, the stick with the missing SMD can't clock higher than 3600MHz, while the other stick can do 4000+. I can't tell for sure if it's the ICs that are incapable (doubt it) or if it was due to the missing SMD (pretty likely).
I have no clue where the SMD went and don't have any soldering equipment or experience. I do have some RipJaws V DDR4 that use the A1 PCB that I could maybe sacrifice an SMD or 2 for my Ballistix Elites. Not too sure if this would work out though or if it's worth the hassle.