if after downloading the new Wod model for WOD and crash a lot in dalaran or other zones, is because Wow can only use 2GB of Ram, but there a way to change that.

if you have 4 or more GB of ram, and a 64bit OS, You can make wow.exe use more memory hence fixing 90% of the crash's

Large Address Aware will do that for you, just download it, open it, Select Wow.exe, be sure the checkbox is checked and click Save. open your game and done.

https://www.techpowerup.com/forums/t...-aware.112556/