I just put together a new PC build and I've noticed something very strange. Whenever the computer is turned on, whether there's an Ethernet cable plugged in or not, the internet in the house slows to a crawl. As soon as I put the computer in Sleep mode or turn it off, the internet jumps up to normal speed again. Besides the new computer, three other devices in the house are running on wireless connections and the new computer is hard lined into the router, as it is incapable of wireless connections. (The same configuration that I had before with my old computer rig.) All drivers are up to date to the extent of my knowledge.
Does anyone have any ideas as to what's going on?