Slow wired with fast wireless.

I have been getting very slow wired connection from my gateway/router for the past few days. I connected directly to it with my laptop and still could not break 30mbs connection (I have the gig speed package). I will get around 300-500 via WiFi at the same time the hard wire is getting 30. I tried multiple cables with no change. Wifi is always significantly faster.

I already swapped out the gateway/router and it continued to do the exact same thing.