Never heard of anything like that. Are you sure it's DX11 that's causing the crash? When I got my new computer (very recently) I didn't have any problems.
However, I have had issues with the game installing correctly which usually gives me an issue like the one you're describing. Usually just reinstalling fixes it so I'd say try that first.
If that and the usual things like disabling your firewall, running as admin (even the patcher when you first install the game), updating your video drivers, etc. don't work then I don't know what to tell you. Somebody here has had the issue before though, so we'll get you online and playing. Sometimes old games just take a little work to get off the ground on new systems.
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[3:23:33 PM] Bogle: i like playing wow i dont have to worry about positioning or if theres people on me or casting any other spell other than a heal