1. You didn't list your storage, but I'm going to assume you have mechanical drives.
2. Shogun and most other total war series RTS games have crazy long load times. Even if you have a fast HDD, it just has poor MB/sec read speeds for some odd reason. I have similar issues and its a known issue; some have stated to run the game in dx9 mode to reduce times, but honestly, I didn't remedy my load times at all.
What you could use is a fast SSD to boost load times; that's about it. Maybe think about putting a liquid cooling loop for your loud 470. If you have a microcenter nearby, you can check to see if you can grab a Danger Den 470 full coverage water block for $36 (link
), Add a cheap 1 or 2 fan 120mm radiator, a cheap xspc pump/reservoir and you'd almost be rocking it for $100-150ish; maybe even cheaper.