Dont exactly have an exact setup as you do but for testing purposes i downloaded the game (mind you ive never played this game and tbh dont really know how to so the tests that i did was very very limited) and did manage to do some test on 2 of my 4 systems that are close to yours.
(1st Test system)
CPU - FX8370E (OC to 4.6Ghz)
GPU - RX470 4GB
Mem - 16gb 1600 ram in dual channel mode
Storage Device - HDD
Resolution used for Testing - 1600x900 & 1080p
All Drivers up to date
-the game runs at about at around 17-19fps only inside crowded towns where there are lots of players selling stuff but as soon as you turn your camera towards/move to the outer gates the FPS jumps to above 60fps, same for the other maps, as long as it isnt that crowded like in the main castle the fps is always above 60fps on the RX470 and honestly its not that surprising, its an old game that only uses 1 core and 1-2 threads so its to be expected.
(2nd Test System)
CPU - Xeon x5670 (equivalent in performance to a 1st gen i7)
GPU - GTX1060 6gb
Mem - 16gb 1600 DDR3 ECC ram in dual channel mode
Storage Device - SDD
Resolution used for Testing - 1600x900 & 1080p
All Drivers up to date
-Fps is pretty much the same as the first test system, 17-19 in the middle of a very crowded castle town with fps climing above 60fps as soon as i leave turn towards the gates or leave the castle, cant really test this game much as i dont really play it and cant spend much time testing as i needed this system for rendering work (sorry)
Not really sure if its a problem with the CPU or that its just a very old game that needs its engine to be more core/thread aware (most likely its the latter) or that it was coded with intel CPUs in mind, cant really be sure since im still getting the same result on my xeon system which is close to the performance of my FX system
Sadly im unable to run Knight online on my Ryzen system and im not really sure why (to be exact, its the anti cheat software engine that comes with the game thats refusing to load when you click start) could be because i just recently updated windows 10 to the May v2004 update or could be some other stuff that im not aware of, cant really be sure as i dont really have the time to do a clean install atm just to test one game.
