Compare RAM 3600MHZCL16 and 4000MHZ CL19 models.
Compare RAM 3600MHZCL16 and 4000MHZ CL19 models.
I have seen a few CPUs do 4000MT/s in 1:1 mode. They are kinda rare, but they exist (I even saw one guy get 4066MT/s working in 1:1 mode, though it's only that one chip), and they are more common with the single CCD chips like the 5700X. 3800 should just work on most Ryzen 5000 chips, though you will need to manually set it to 1:1 mode as most boards default to desynched mode when going above 3600. Granted, 3800+ only really makes a difference if you're going with full custom subtimings Samsung B die, if you're just doing auto settings it's usually a waste of time, and I wouldn't recommend an XMP for over 3600. Voltages that will damage your CPU don't help get over 3800 to work. On Ryzen 3000/5000 it pretty much either it works or it doesn't, and when you get to voltages that can damage a CPU, they start scaling inversely with voltage.