I'm really curious about the test rig ... and possibly one that is guaranteed ... for 9000MT/s DDR5 kits. Right now, there are only a few motherboards that handle 8200MT/s+, and even 8200 is a gamble.
CPUs and motherboards are the only problem. RAM can reach or pass 9000MT/s (not all kits, but those higher binned). At least I reached 9k on Patriot 8000 and 8200 kits in the last weeks, but it was far from stable.
Edit:
I guess we will see something new in the upcoming months; not new CPUs or chipsets, but modified memory modules with additional controllers to boost max frequencies. I was wondering how they managed to reach 9k stable settings, but now I know what to expect.