mine gets pretty laggy the more i play too. worse system though, only 8g ram (i'm actually waiting to play more till i get another 8g i ordered). but similar problem with the more turns, the slower it gets. gpu 3d section is always maxed out at 100%, constantly using between 1.7g and 2g video card 3d memory, when the minimum and recommended for a video card is 1g. was gunna wait till my new ram came in (hopefully tomorrow) to try it out and write something up on the effects pre and post. kinda disheartening to see that you're having the same problem with 32g though...

one thing i have heard that might work with better systems, is reducing your refresh rate down to about 60fps. other ppl have mentioned this makes their game run better while having their comp fans make less noise too.

I just upgraded and it runs great.  Prior to my upgrade I was running a i7-4790k with a GTX 970 and it ran just fine.  Although this was also DX11 - I'm guessing you're running DX12 so perhaps this makes the interaction with the video card different and possibly more resource hungry?

I had a couple of hard-crashes that I'm pretty sure were video-driver related.  But they were few and far between and the resource load was pretty light.  I was also basically running on whatever all the default video settings were (I didn't go through and turn them all down or anything) and was playing on medium maps.

Hope this datapoint helps you pinpoint whatever the issue is..

-tid242

edit: I was definitely not ever running in 4k... just 1080p

It's quite possible that AI strategy threads are being offloaded onto the GPU and it's actually those that are chewing up all those clockcycles for some reason.  Obviously someone who knows a lot more about this would have to chime in on this though..

Did you activate Low-Res tectures? I play at full hd and this is my first action when the game starts lagging.

Make sure to restart the game. Not all settings need a restart, but this one does.

Have you stress tested your GPU recently? It could be failing. Not anything anyone wants to hear, but it's a sad reality of computers. Most testing software is free so you might want to look into that and see if there's a physical issue affecting your gaming experience. And before you say other games run fine, also remember that each bit of software out there will run somewhat differently than another. So maybe GC3 runs smooth as silk on your GPU, but isn't hitting the part that's acting up when running GC4.

Thx.

The game defaulted to that setting so I thought it was the optimal choice, as my 2080ti is definitely not happy with something in the game. 

Yep - it's running with low res textures

This really isn't my thing, but have you tested your graphics card to see if it's simply failing?