AXE7300 Router with Nighthawk 32 x 8 DOCSIS 3.1 Cable Modem

[SB007]

My current setup is the Nighthawk 32 x 8 DOCSIS 3.1 Cable Modem with a Nighthawk AC2300 Dual-Band Wi-Fi 5 Router. This is providing about 560 - 590 mbps.

My internet provider upgraded me to 1000 mbps so I recently upgraded to a AXE7300 Router (with the same modem above) and am receiving the same mbps and it seems more inconsistent, i.e. my phone was registering significantly more mbps than my laptop.

I included links to the products below. What am I doing wrong?

https://www.bestbuy.com/site/netgear-nighthawk-32-x-8-docsis-3-1-cable-modem/6425817.p?skuId=6425817

https://www.bestbuy.com/site/netgear-nighthawk-ac2300-dual-band-wi-fi-5-router-black/5712201.p?skuId...

https://www.bestbuy.com/site/netgear-nighthawk-axe7300-tri-band-wi-fi-router-black/6515295.p?skuId=6...

Thank you.

[FURRYe38]

What speeds do you see with a PC ethernet connected to the back of the modem with out any router in the middile? 

What Firmware version is currently loaded?

Be sure your using a good quality LAN cable between the modem and router. CAT6A STP is recommended.