Hi Tiangor.

• Do you use gaming mouse?

If yes I would try to lower your mouse polling rate. Or just try connect ordinary mouse.

• Does this issue also happen when you lower your in game video settings?

For example when you set everything to medium or low.

Also make sure in task manager that your PC resources (CPU/RAM/GPU/DISK) are not eaten too much by any other program.

• What is your monitor refresh rate?

I also suggest turning V-synch OFF.

• Is server performance OK? Isn't the server overloaded - High slots count/Custom mods?

You can also try to delete DayZ folder in directory "C:\Users\<Name>\AppData\Local\" It will reset your in game settings and keybindings. (Some keybindings and setting can cause troubles sometimes so this should fix it).

I would also suggest to verify game files.