Ralston18 :
What was the original reason for purchasing the Cat 7 Ethernet cable?
Modem - make and model, router - make and model?
Who has admin rights to your network router?
You may need assistance from that person to check the router's configuration and error logs (if available and enabled).
Please allow me to clarify my situation. I purchased a new gaming PC, downloaded Fortnite, and initially tried to play it through our wifi connection. It was too slow to play. Every other game (e.g. World of Warships) works fine through the wifi with my PC. I also play Fortnite on our XBox through the wifi without any issues. My uncle suggested that I try to connect with an ethernet cable. I did that and was able to play Fortnite the first day using the ethernet cable without any issues. But now it is back to its original state of being too slow to play.
The modem is built into the CyberpowerPC. Bazooka?
The router is a German Fritzbox Fon WLAN 7360 (we are American living in Germany). Our internet service is through a cable bundle of TV, telephone, and internet all steaming through the cable. Having fewer other users does not noticeably improve the situation with my attempt to play Fortnite on the PC.
We aren't really on a network. Our house has only the single internet connection to the single Fritzbox router.