same here
but won't play anymore to get refund. I'll buy the game at low price in the future. my gpu run a 100% even at lowest setting 60fps. D3 run at highest.
Haven't tried online but offline, I was freezing for about 40sec every 3 minutes, game resume after.
take a look to virtual memory allowed space, and someone spotted amd FX processor was the problem without detail. I'm runing on 8gb ram

keep us informed, you probably played more than 2 hours

I have unfortunately played more than 2 hours just trying to fix trouble shoot the issue otherwise I would refund. I do run an AMD FX processor as well.

There indeed does seem to be a compatibility issue related to the AMD FX chipset. I also have one and experience lockup and crashes as well. A couple of us started using https://www.nvidia.com/en-us/geforce-now/ which resolves the issue entirely, but you will need to use the service. You'll get 90 days free if you sign up using your CC or Paypal account.

Played for a few hours and didn't have a single issue.

hope this helps.