@boladinhodazl
Same issue here, after few minutes or when i fast travel my FPS is going from 60 to 15...
Only fix is that if i travel to Norway and load a savegame from England or if i'm restarting the game the FPS are back to normal but the problem still comes back again all over again and again...

The problem has been since day one but this time it's different problem, after latest patches my FPS drops got worse, few months ago it was from 60 FPS to 40/30 due to memory leak problem or something.
I also get FPS drops when alt-tabing (in fullscreen mode) i remember they mention in patch note that they have fixed it but that didn't fix for me.
Now my FPS drops has gotten worse, i get from 60FPS to 15-10 FPS!! (It's like they cut 50% of performance) This is unplayable. Temporary fix is that i have to restart the game or travel to Norway then load the savegame where i was in England. Then problem is happening again all over again and again...
I've seen couple people with this problem, how they haven't fix this mess? Is it just another bad optimization of Ubisoft??
Origins and Odyssey ran better than this. (Yes my PC is old but it doesn't matter since it also happens when playing on low resolution,lowest settings,lowest resolution scale and the performance is still cut to 50%.

Photo of graphs :

@boladinhodazl
Same issue here, after few minutes or when i fast travel my FPS is going from 60 to 15...
Only fix is that if i travel to Norway and load a savegame from England or if i'm restarting the game the FPS are back to normal but the problem still comes back again all over again and again...

They mention that they have fixed this issue with alt-tabing and FPS dropping but looks like they didn't fix for me. Same issue that it goes down from 60 fps to 15 fps after few minutes or fast travel...

Same here, eh i guess no fix yet...

@turlu2d I already have that turned off since long time. So no it don't work for me.

Same problem here and that's something new i had similiar problem before old patches i remember that i had fps drops from 60 to 30 due to memory leak or w/e and GPU usage was much lower. But then now days it's from 60 to 10-15! And GPU usage is 99% so i have no idea what's wrong but it's getting worse than day one patch... I've tried everything to fix this issue and nothing i can do. Even if i lower my graphic settings and resolution scale, same thing. Restarting the game fixes the problem but 10 mins later or if i'm fast traveling then problem appears again...
Yes i did also as Ubi-Mark suggested, NOTHING.

So i guess nobody will respond? What a shame

Hello. I have the problem with this game. Framerates are fine when i start to play but then after 1 hour the framerates got worse, from 60 fps to 20-30. Restarting the game fixes the issue but problem comes back after 1 hour or a few minutes, it's getting worse and issue can come after 20 mins than 1 hour. I don't have this issue in other games and with Assassin's Creed Odyssey.
Nvidia drivers are newest,
Windows 10 version 2004,
I verified the game and nothing.
Full Screen optimization is off.
Also i want to add that i don't had this issue in Norway, it happens in England.