Can you tell if it's FPS lag or network-related? I just now started experiencing pretty bad FPS lag in instances, and I have no idea why. My computer isn't the best, but it's always run the game smoothly. I've been running benchmark after benchmark, and my computer seems perfectly fine. I'm fine in the open world. Yes, I lag in the busy Rhalgr's Reach, but not any more than normal, dipping from 60 to 40 FPS. And if this did apply to the open world as much as it's applying to instances, I'd be running at about 0 FPS in the Reach. But it dips down into the teens when I'm in instances.