Make sure you disable vsync, and turn down those unit settings you've got cranked up.
Also the Total War games typically require seriously monster CPUs if you want good performance, an i5-750 is getting on for 5 years old now and you have a fairly modest overclock. I would start pushing the envelope a bit, 3.8ghz minimum.
Surely the unit settings only apply on the battlefield? Not the campaign map which is where I'm complaining about the major FPS problem.
I can't remember if I have VSync on or not, I'll check later.
I don't really like the idea of trying to OC more, back when I set this OC years ago this was the best I could achieve without needing silly voltages. (I was probably doing it wrong though
![Big Grin :D :D](/styles/default/xenforo/vbSmilies/Normal/biggrin.gif)
I did have the unlimited video settings box ticked up until recently but read somewhere (can't remember where) that it can actually cause more problems. I'll try reselecting.
Crossfire is also disabled as stated in the OP.
Thanks for the responses here guys. Glad to know I'm at least not totally alone in having problems. I still enjoy the game though
![Smile :) :)](/styles/default/xenforo/vbSmilies/Normal/smile.gif)