I don't have the latest and greatest HW but good enough to let me run just about any game with max settings (980GTX, 4770k i7 CPU, 16 GB ram, a good SSD, etc.)
I consistently get 140 FPS in solo instances, 100+ in delves and public dungeons but in cities or just plain overland questing sometimes it drops sub 30 even if there aren't a lot of other players around. I don't get it.
Anyone know what causes this and how to work around it?