Check your local network for delays.
Check your local network for delays.
I’d also attempt to connect other devices directly on the network that are permanently connected to the router. (Uncertain if there’s a switch involved) Ideally, link your PC and another device via Ethernet to a switch, then connect the switch to the router. This should work around the router once the connection is made, helping pinpoint the source of the high ping. Once you’ve gone through this step, if the pings persist, it’s likely the cable itself is the issue. If they disappear, the problem probably lies with the router or the cable connecting to it.