My Modem can support 1.5 gbps to the internet. The cat5e cable between the modem and my router can support 1.0 gbps (rated to that at least), and the one between the router and my desktop is the same.

Over wifi, I can get around 600mbit to the router at best.

Running generic speedtest websites, I'm seeing myself top out at around 900mbit or so. Which should be enough for all my needs for long time.