I have the Gigabyte card...It can't last 5 minutes with the "Fast" new bios. Based on the AMD support forums, I'm not alone in this realization. Of course Gigabyte support wants me to try a new motherboard and new power supply as part of the trouble shooting process
I bought a Powercolor RX 5600 XT Red Dragon with the new BIOS installed and 14GBPS sticker on the box and same problem, the most I got it to last for was 1 Hour 17 Minutes running it at 30% less power, the card was red hot to the touch when I removed it from my system all over. Even in Windows and opening Steam was enough to trigger a hard crash!
Running the Division 2 caused overheat sparkles on the monitor after 20 minutes at stock settings. I've got a Corsair RM 750X PSU which 80+ Gold and tried both sets of AMD Drivers from clean installs via DDU and my rig was having none of it. Stuck my GTX 1660 back in and overclocked it has far as it could go and the system is stable as a rock. I've asked for a return and refund for the 5600 XT but I may try a older BIOS flash on it while I'm waiting and see what it does.