I recently built a new computer and when I set it up and started downloading applications/games, I noticed that my download speeds are capped at 20 megabits per second. I have a 50 mbps internet service and every other device seems to be working fine, but when I try a speed test, it just stays right around 20 mbps. I have an ASUS Z270-A motherboard with an Intel ethernet adapter. (Intel(R) Ethernet Connection (5) I219-V) It is a Gigabit port. Please help I am becoming very frustrated as my old PC (using the same ethernet cable, a CAT5) did not have this problem. I have tried switching ports on my router, re-installing drivers, re-booting modem/router just to name a few.