I haven't had this while either joining multiplayer servers or hosting. Did you try verifying game files through steam?

Do you use Arma 3 Alpha or Arma 3 Dev version?

We need dxdiag and 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 5,000k, so you can attach here. Thank you.

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

Ticket closed due to lack of information. If the issue is still valid, please create a new ticket and add the required files (DxDiag, .rpt, .bidmp and .mdmp) as per the how-to-guide. (Red button, top right corner.)