I'm having performance problems with Multiplayer. In Singleplayer I get more reasonable framerates - in the range of 40-70 FPS - with an Nvidia GTX 1070. In MP I can't seem to reach 30 and usually hover around 20-25 on all maps.
It seems to vary a bit however, as yesterday I was able to play at over 30 FPS at least most of the time (but this is from memory). At the current 20-25 FPS MP is not very fun as I'm not able to perform. I was thinking it may be related to server-side performance, but others in-game report much higher framerates.
My system monitor reports 75% CPU usage while idle in the lobby. Changing between different presets under performance settings has no noticeable effect on my framerate.
Edit: After restarting the game, CPU usage while in queue now lies around 15% and I get 100+ FPS in both the menu and in-game. *shrug*
Edit 2: It happened again after a server crashed and I joined a Team Deathmatch on the Aserai map right after. Another restart fixed it, but I haven't played on that map again so not sure if it was the server disconnect, the map or something else.