Video Card related lag?

[HoneyBiscuit]

I'm not entirely sure then. Your CPU temps check out okay too right?

The part I'm finding hard to understand is that you said it only occurs during "prime time."

So your FPS is normal on the off hours? That would seem completely irrelevant to something like frame rates.

The only other idea I've got is to try older drivers instead of the most up to date drivers. Or turning down some graphics settings. Not saying your computer can't run it. But if there's some funny business going on, your card might not be playing nice with some of the settings. Which would indicate an issue on the game's end.