The game is stuttering like crazy in co-op, but not in single player game

[AtMAPLE]

I got 150+fps with 9800x3d+4090(no oc), but when i coop with my friend, i just got 80-90 fps and stuttering like crazy, we both have the problem whoever host the game, and when we seperately run the game in single player, it is just fine for both of us.
if it helps, co-op works fine in farcry 5/6 but not this game when we play.
My friend has a 4060, he got around 70 fps when he play sp, but every time he joins my game(or i join his game), we both starts to stutter and the game becomes not smooth at all, seems there is a certain delay, but our internet connection to ubisoft connect is perfect.

Does anyone have any solution? Fun game but wont able to play with my bud

[JayDee]

Same for me, but I got no solution. Tried a lot of things, like changing resolution, fsr, dlss, graphic settings, window mode.
Nothing helps, but as soon as my coop partner leaves the game I'm back to 140fps.
I prob try to refund :(

[Ubi-Vinci]

Hello AtMAPLE and JayDee

Apologies for the late reply and I'm sorry to hear that the game performance drops while you play online in a co-op session.

Playing online may introduce some delay and performance drops, which is to be expected. The impact on your gameplay will vary based on the connection quality of both players.

Please make sure that both you and your co-op partner complete our guide on troubleshooting connectivity issues on PC[www.ubisoft.com]

Additionally, you can check your Internet router's configuration:

Security level: If set to high or strict, lower it by one step.
UPnP: Ensure it is enabled.

You can also change the default DNS on your PC to Google's DNS 8.8.8.8 and 8.8.4.4 or Cloudflare 1.1.1.1. These DNS can provide a better and faster connection in your location.

For detailed instructions on how to change DNS address, please refer to online guides or your router users' manual.

Let us know if this made the co-op performance better.

[Pti-tomtom]

Hello, has anyone finally found a solution to get the coop working properly?

[Ubi-WheelyDuck]

Originally posted by Pti-tomtom:

Hello, has anyone finally found a solution to get the coop working properly?

Hello Pti-tomtom, sorry to hear that you have had trouble with co-op not working properly. Can I check if you have completed all steps mentioned by Ubi-Vinci above? We do find that these help others having trouble

Many thanks

[Pti-tomtom]

Yes, everything has already been tested, we have no problems with ALL recent co-op games.

[Ubi-Vinci]

Sorry to hear it, Pti-tomtom.

I understand you and your friend tried all the troubleshooting, including the DNS changes advised above and yet you get significantly worse performance when playing in co-op mode.

Can you give us details on what FPS are you getting when playing solo and together?