This has been happening to me for a while now, too.
NVIDIA GeForce GTX1070 SC
i5 5600K
32 GB Ram
Windows, Origin and NVIDIA drivers up-to-date
All I have running is Chrome
Repaired TS4 game client
Reinstalled game client to its own SSD
With mods, without mods, doesn't matter
Have all game packs, and the issue doesn't seem to be impacted by map - have reproduced issue in Oasis Springs, Strangerville, and Evergreen Harbor.
The game is using a lot of power, but I'm not even hitting 40% of my CPU or memory with everything running, and only 20% of my GPU.
Client consistently drops to 10-14 FPS in build/buy mode, when it normally runs at 60 FPS.
Part of me thinks it must be something in-world going on that the game isn't cleaning up (kind of how you needed NRAAS in TS3 to clean up the game world or else it would crash your save), and my first impulse was to think it was the weather events, or maybe it's just the natural byproduct of having every pack installed (I don't use Build/Buy CC). If I leave it to sit in build/buy for a minute, my FPS will pick back up to 55-60, so I wonder if it's having to load or something? My graphics settings don't seem to impact the issue, but I have found that a quick way to stabilize the client is opening the game options. I turned off auto-reconnect and share usage data, as well as online notifications.
I have a huge tray file, too (I have almost 800 uploads to the gallery, and more still unshared in my library) but I don't know if that's part of the issue or not.
@IslaRoses The game always has to load icons, etc.
Have you tried the tip suggested by someone in the master thread of this issue? https://answers.ea.com/t5/Technical-Issues-PC/CURRENT-ISSUE-Incredibly-Low-FPS-when-connected-to-Internet/m-p/9218406#M180558
I really think it has to do with that as well, as since updating my LAN drivers (though I have Intel, not Realtek) seemingly works too.
