One thing Ive noticed with my problem (lag,fps drop, sound stuttering), is that it only happens when the servers are least used.
Getting 20-30 fps with massive lag and fps drops when people fire, but only during the day (06:00 - 20:00). While on the other hand, ive got 40-60 fps and none to a bit of lag during night hours(20:00+), when the servers "should" be at highest capacity.
One more thing that makes me think its server side, is the load time of the garage ship at login, or after battle. Where as it loads faster (1,2 seconds) during night time, and slower (8-10 seconds) during the day. And dont get me wrong, but the PC requirements while in the garage are way less, compared to in game.
Eventhough my rig is pretty outdated, I dont think thats where the problem is.