Ethernet, gaming problems

[Cal01]

Hello all, I recently got a new router put in the house and I ran a diagnostics test the other day to see why my game input felt slightly delayed for my gaming pc. It turns out there is a problem with the ethernet (and wifi)? I use tp links could this just be the problem although they seemed to be fine with the old router. 

[Martyn]

what do you use with tp links? Also, your images aren't showing; if you upload images with visible IPs or sensitive information, they'll auto-delete.

[Cal01]

I did hide that part of the information but must still pick it up, the images just show it says there is a problem and I am maxed at 100mbps on the pc. I use tp links because my pc is in the room directly below from the room above with the router.

[legacy1]

Your  tp links HomePlug - Network Via Mains  is limited to 100Mb 

If you got a new hub it might not like it get your own router with 1Gb ports put hub in modem mode and 1Gb HomePlug - Network Via Mains not that I recommend them due to security suggest better wifi