Having problem overclocking or flashing the bios of Sapphire Radeon NITRO+ RX 580 8GB GDDR5 PCI-E Dual HDMI / DVI-D / Dual DP w/ backplate (UEFI)

how long did you let this run before the screen shot? unless you have a temp control set in your startup config, this thing should be well above 72c ?

Also check out @cryptomined video and post… this might fix your problem