Hi, I'm overclocking my Kingbank 2×24 6000 MT/s CL28 and I've reached this point (nitromode on, 1-2-0 8x 8x)(I have a fan, the RAM doesn't exceed 40 degrees under stress). Now, however, there are two things I don't understand at all:

-Can I improve some other timings, considering that the system is practically rock solid?

-One day I managed to reach 6400 MT/s 28-18-35-35-40, vdd 1.53 and vsoc 1.25, it seemed stable after a night on testmem5 with ddr5 ryzen3d profile. However, randomly, the system became unstable, and since that day, the PC refuses to start at 6400 MT/s (I haven't tried 6200): how is this possible? I don't think the system has degraded, considering that the voltages were normal and that I kept that profile in the BIOS for less than two days. I tried updating the BIOS (perhaps the training had bugged), clear CMOS, and releasing the timings and voltages a little, but nothing worked. I hope you can give me a logical explanation.