For some reason when i play Minecraft CTF ( capture the flag) its lags my whole computer. I know my computer can run it i can play other servers on max its just CTF. It messes up everything I talk on skype with friends and it just messes that up too. Major lag for no reason its not my internet, i know my computer to run it, Please help.
Added (1). Its can't be the server because my friends don't have lag when we play the same server.