@Manolo86 sorry guys. Didn't realize the link was dead now. This has gone on way too long with no long term resolution. Come on TP Link. You guys make quality products. Back them up with support....

@Chaz have you tried the beta firmware they posted earlier here? I know others have tried it and it didn't fix their problem but it did for me. I installed it and had my router automatically reboot...

Hey FrostFox, As I mentioned in my previous post, I too was still having this issue even after installing the Beta firmware. Now however after several days of running the beta firmware, my speeds...

I also have Gigabit service with Sprectrum and have a wired connection. When testing straight to the modem, I average 945 down. With the C5400X I am only getting around 500-600 down. These results...