Without any problem, withoutn crash. Sapphire RX470 4GB Nitro+ (moded bios)
That's probably Samsung memory you've got there? Those can usually overclock to 2100+ with 1750 strap timings. But most 470s, as far as I'm aware, don't use Samsung chips but rather Hynix (not bad as well) or Elpida (those are a bit worse I think?).
Elpida memory gpu 1122 / mem 2020 core voltage -96mV . I got with samsung memory too. I will test them in few day...