Converted TM router not fast enough

[ramman]

I've flashed my T-mobile ac1900 to Asus RT-AC68U with latest firmware. I have 1GB Internet, after the upgrade I am getting hardly 60-80 Mbps on LAN. Earlier on LAN with ac1900 I used to get 870 Mbps. Flashed it again to Merlin, currently running Merlin v384.19 still getting same speed, no change. When flashing I picked the latest CFE 2.0.0.6 US AiMesh, will that be a issue?

Screenshots from my settings:

Appreciate if you can help. I am expecting close to 1Gb both on LAN and on WiFi.

I tried all different ways by updating to lower version of firmware but still no luck. I am still getting less than 100 Mbps.

 

[thiggins]

Flashing this router with ASUS or RMerlin firmware is illegal and not supported on SNBForums. Don't expect much help here.

 

[Ronald Schwerer]

Regardless of the router or brand, that is a symptom of a bad cable or connector. That's assuming whatever is connected to LAN1 also supports 1GB. So try a CAT5E or CAT6 cable and a different LAN port. And yes, that CFE could be causing problems.