We need dxdiag and all files from this folder for solve your problem. C:\Users\<Name>\AppData\Local\Arma 3 Alpha\

Can you upload somewhere in winrar package please?
When package will be smaller than 2,097k, so you can attach here. Thank you.

http://feedback.arma3.com/how-to-user.html.html

Closing due to lack of information / no response in a long time.

If this issue is still reproducable for you, please create a new ticket and make sure to include all necessary info / files.