Rome: Total War All possible bad FPS fixes

ATTENTION, THIS ALONE SHOULD BE ENOUGH TO FIX FPS, ONLY TRY OTHER METHODS IF THIS FAILS

Source: https://youtu.be/KD66jDZj6Q0?list=LL

In short, this fix was what worked for me, for some reason the steam version 1.51, runs poorly, the retail version 1.5, runs much better, easily 2x, if not 3x the FPS

Link to the v 1.5 of the game: https://drive.google.com/file/d/1KfzWr1JkOeZUxA9NsrZ4-SByOtHPULVh/view
What you should find

Right click on the game in your steam Library
-> Properties
->Installed files
->Browse
->Drop the 2 exe files, and the data file, and replace all in the main RTW folder

That's it, however this does break the steam overlay so the best fix is to again

Right click on the game in your steam Library
-> Go General
-> Launch options
-> In the bar where you can type, type "-ne"

Makes it so the game tabs out properly

Source: https://youtu.be/LYM6FaNe_24

This fix only offered me marginal FPS improvements, but it's been around a long time and worked for others and might be worth a try

You just download the file and drop it in the main game folder that your get through via
properties -> installed files

Here is a supposedly more recent version of the .dll files, use this (Found it on steam forums)
https://github.com/crosire/d3d8to9/releases

You right click the game .exe files, go
->Properties
->Compatability

And then set it so Windows 7, or Windows XP service packages, may grant stability or FPS

You may also try running the game in Admin mode, but that may cause some issues

Or disable the fullscreen optimization, that may work for some

Basically, the game was optimized to run on 1 core, so you make it run on one core to gain performance

Just follow this video
https://youtu.be/XgnV73-ibRg

More available fixes are in this link, including DG Voodoo and DirectX 9 stuff

https://www.pcgamingwiki.com/wiki/Rome:_Total_War#Low_FPS

https://ntcore.com/4gb-patch/

Use this tool to patch the .exe file of the game to have it use more Ram

Go to the installed files and delete those first, then delete the game, this will make steam re-download the game fresh, because otherwise if you just un install through steam it re-downloads the game with all the changes