I recently burned through my second Nvidia display adapter over several years of Civ playing. This latest one I've had for 3 years. Maybe Nvidia undercools them, but it's inarguable that Civ's engine is very hard on it. There's a lot of heat after just an hour or so of playing. And, I think it's inarguable that more could be done by Firaxis to optimize both the engine and the artwork. There was a noticeable difference both in gameplay speed and in the level of load put on the display adapter when BTS was issued (I think it was BNW but maybe it was GNK), which I attribute to optimizing the 3d models. And there's a definite memory leak or similar issue with the core engine... was never fixed. My hope is that Civ6 will address both these things from the start. Let's get a core engine that is a better steward of the computer's hardware. And art assets (models etc.) that are optimized from the start.