Ahoy @MrDeaf,
Try removing any mods and relaunch the game.
If the problem still persists, do a check/repair of the game client.
Also, since you have a fairly sturdy game rig, the problem might reside with your Internet connection.
Is anyone else on-line and streaming/gaming while you're online?
Try running the game with no other person streaming/gaming while you're in battle.
If problem persists, create a WGCheck report and send it over to the support team in a ticket so they can take a look
#anchorsaweigh