i remember having issue with my GPU not long ago, when I did the xfire.
game would just crash every time, pc would black screen or restart, or shut down.
What you CAN do is, reseat your Graphics card, and your ram sticks, make sure its all in right , nice and tight,
Go to your game and make...
a lot of times PB errors means its not runing right, could be PBa and PBb in incoming firewall settings, you only need 1 of each, delete the duplicates
i just finished my build, reused my xfire vega56s, it was based on 3800x, on MSI x570 gaming edge mobo, with 970 evo 1tb m.2, 2tb samsung 860 evo, corsair 1200atx PS, couple 8 gig tridents that light up(changed the timings to get the full 3600 speed they are rated for , and some cheap tower i...
just throwing this out there, can you tether your phones connection? why dont you give that a try?
also- have you tried repairing game files, a lot of times the cvrashes are related to corrupted data. it has happeend to me couple of times