SK1PTERS
Recruit
Let me say that bugs and crashing aside, stutter, as well as hardware-related bugs, but purely fps and performance, your potato computer is your own problem. Your 8gb ram 3.2 ghz processor is the problem.
I have very consistent FPS on a rig I built in 2015. This is computer gaming, you need a gaming computer.
This game is nowhere near the level of mediocrity that M&B and Warband were in the visuals department. If you were expecting a game that you could play with the same toaster, then you were delusional from the beginning. It has been 10 years of advancement in gaming, and TW obviously was able to pour more resources into this title, yet somehow this game runs even smoother than Warband for me.
I love butter
Specs
16 gb DDR3 1866
i7-4790K 4 core 4.0 ghz
gtx 970
If you look at the recommended system specs (not minimum, recommended specs) listed on the official steam page, you should not need an i7 to run the game passably. I have an i5 8400 and a RX 580, and Im getting poor overall performance, as well as freezes in larger battles. Around 20-35 fps. Siege battle performance is completely borked to around 17 fps because of what I assume to be AI pathing, FPS goes to normal as soon as the gate is broken.
To reiterate, I have a more powerful GPU than you, and the game crashes at least twice per hour with major fps lag in all large scale battles. It's not the visuals that's causing lag, its calculating unit actions/movements and AI. CPU stuff.
Also this game runs fine with 8 GB of RAM, in fact its the recommended amount of RAM listed on the page. My memory usage isn't maxed out when playing this.
Please refrain from strawmanning and saying people with old i3's and integrated graphics are expecting 144 fps with 1000 man sieges. This is not the case, the game is currently poorly optimized. I've watched major streamers with powerful rigs getting performance issues, especially during sieges.