May as well use "all-core" if they're all set to the same CO value. Back it down to -25 and see if that fixes it.
If you did want to tweak "per-core" values, I believe Event Manager will indicate the core # where the crash occurred, or you can use Task Manager to set core affinity to one at a time and test to see which one is crashing. Once you figure out which core it is adjust that one down to -25 and leave the rest at -30.
Ryzen R7 5700X | B550 Gaming X | 2x16GB G.Skill 3600 | Radeon RX 7900XT
Ryzen R7 5700G | B550 Gaming X | 2x8GB G.Skill 4000 | Radeon Vega 8 IGP
Ryzen R5 5600 | B550 Gaming Edge | 4x8GB G.Skill 3600 | Radeon RX 6800XT