My RAM kit rated for 3300. Never reached it. Did 3000 for a couple years, then couldn't remain stable so lowered to 29xx, then 2800. Now can't remain stable above 1600. System is 3 years old. 1950X warranty runs out mid January 2021. RAM kit is 128GB (16GBx8). At 2600 memtest86 was flooding the screen with red errors. I really don't look forward to testing sticks individually in every slot. I don't have extra TR4 CPU/motherboard for additional testing.
Do some cpus have weak memory controllers? Was I too hard on my CPU? I wasn't impressed with OC gains when experimenting so I always ran it at stock clocks.