When playing Minecraft servers I get around 120 fps when standing still, or walking around but as soon as I start looking around my fps drops to around 20-30. I've never had this problem before, and I've spent about an hour in video setting trying to figure out what is causing it but I've had no luck. I've restarted my computer, reinstalled, but stills nothing. If anyone has had this problem or thinks they know a solution, please let me know. Also I'm playing Java version of Minecraft and I've already tried multiple servers.