My game crashes after 1-2 minutes of starting up the game

This is something that’s been happening for a while now and I’m at a bit of an ends…I need some help.

After starting the game up, about a minute or so after, I get the message.
“Rendering Device has been lost! Your Application is closing”.

I’ve tried underclocking, overclocking, tried to pull up the game when there is no other application up expect Blizzard Battle. Net, updating my drivers and chipset, uninstalling and reinstalling…almost everything some people have suggested.

If someone could please help me, I would really appreciate it because I don’t know what’s causing the issue.

Did you read the forum sticky? "Your Rendering Device Has Been Lost"