All of the cables are fine, they just replaced around Christmas last year when they did the last speed increase because i was worried about this. Literally the only thing was changed was the modem...

@Wonkydemateo Update. I updated to firmware 1.7.4 rebooted ran test and eureka correct speeds. Went to sleep happy. Woke up.... Same stuff again.

Have Cox Internet. They recently just upped our speed from 300 to 500. We had a old. Docsis modem so bought a new 3.1 surfboard. Coax to modem to deco to switch to 2 satellite via cat 6 backhaul. Was...