I found some crazy cuckoo bird on the AnandTech forums who got 4 sticks of 16gb stable at 6000.
He did this using two different vendors! 2 sticks were Samsung and 2 were Hynix.
https://forums.anandtech.com/threads/zen-4-builders-thread.2605910/post-40905898
I found this interesting as AMD’s listed max memory speed is the same for 4x1R and 4x2R.
Max Memory Speed
2x1R DDR5-5200
2x2R DDR5-5200
4x1R DDR5-3600
4x2R DDR5-3600
Anyone have two different dual rank kits from different vendors lying around? 