Your new computer shouldn't effect your ping unless you're using something very very old that doesn't support the speed on your internet haha. Restart your router/modem and PC and see if that cleans everything up.
'Ping is a computer network administration software utility used to test the reach-ability of a host on an Internet Protocol (IP) network. It measures the round-trip time for messages sent from the originating host to a destination computer that are echoed back to the source.'