Poor boy, picking the sarcastic option not knowing what you char was posting.... *scnr*
Ok, now serious:
the problem with FPS is IMHO nothing with poly's or texture size any of that things that make the game looking good (beside nvidia's bull-shit-rays); Fact is: the engine is fucked off beyond recognition! Its an old 2000-era relict that got added bells and whistles while no-body (literally) seems to taken care for steady run on pc at beth.
I've seen this game smooth at its 60' limited in full ultra on mediocore systems, while on mine it has bad FPS drops and mini-stuttering when moving side-ways: i move forward at 60, back at 60 but looking sideways going a or d and it mini stutters.... and when I'm inside a building FPS can drop down into the 30's at 1440p!
My rig is none standard but a full blown work-station thats here for other stuff (Xeon E5-1650v3, 64GB ECC, 2 x 500GB SSD and 1 x GTX970 bec. I dont pay f*** 2000,- for an equal "professional"-certified graphics card when not needing it) and it sometimes is awful in FO4 with FPS so low I wonder whats wrong.
Funny thing is: the CPU usage is overall low, I can run multiple VM's in background and still have this amazing piece of software running; Even I get FPS in the 30's sometimes neither the GT970's fans nor the system-fans tend to start working over its 30% level, meaning it won't get stressed... the same I got from the ram usage: from my 64gb nothing more than about 4,5 to 6 gb ever get used... the "it needs 8gb ram" was a complete scam! Something that you even expect as its basically the same shit the consoleros got and those are hard limited meaning the whole point of the engine was to get it runing in the consoles and then ignoring anything thats beyond this hardware level;