^^^ You need to run the fans at 80-100%, check GPU-Z and you'll see the memory running at 120 deg C. PowerColor really packs their cards full of sensors.
I'll make you BIOS that runs the memory at 1875, I think that was the magic number. I'll post it in a bit.
my ver. gpu_z i use not display memory temp, so i don't known it so hight @@
with your bios you will post, must be use msi_ab ?and how to config it?( power limit, core clock, mem clock)
Sorry for my awkwardness, i just started to learn mining for a short time