Slow Game Download

You can change game download rates in the Battle.net App Settings -> Downloads under the Download Limits section. To maximize the game download rate, the maximum Network Bandwidth limit must be set to zero. By default, the download rate for Pre-release content is limited to 1000 KB per second.

If you have set the limit to zero, but your download speed doesn't improve, optimize your Internet connection.

If the previous troubleshooting steps didn't resolve the problem, you can ask the Blizzard player community for help on the tech support forums (if available) or other community gaming sites. Local computer or network technicians may also be able to help if you've exhausted all other resources.