I had this problem yesterday, but then it stopped. Today though, it doesn't want to stop.

When I'm in Haven, everything is fine. I can flawlessly waste my time running around and browsing the AH. But when I enter a dungeon, I get d/c after about 20-30 seconds playtime; constantly. I reconnect, takes about 3 second to reload the map, and a couple of hack-n-slash later, BAM, I'm d/ced again. Why?

I have all the latest drivers and my cpu meets the requirement to play the game. What could cause this issue?

Edit: Finally, after wasting 40 energy today, I've been able to play intensively for 3 hours without being d/ced. But it just started again and it frustrates me not knowing why the heck this is happening. Any help?