Hey, I was experiencing the same issue with the Crucial CT16G4SFD824A 16 GB (DDR4, 2400 MT/s, PC4-19200, Dual Rank x8, SODIMM, 260-Pin) Memory. No matter how long I waited, it would never boot. This was weird because I even contacted Netgate and that's what they said they put in the upgraded models of the 7100. I did end up returning the Crucial stick and buying a Kingston KCP424SD8/16 OEM 16GB DDR4 2400MHz SODIMM Laptop RAM Memory Module and it ended up booting and working perfectly. I figured I'd add to the thread of ram modules that worked for the 7100. I am running 24.03-RELEASE with coreboot 01.00.00.20.