@woozle Nothing strange here...The funny thing now is that speedtest starts at around 800mbps and then drops to around 450mbps

Well....not much support from TP-Link...

@woozle Already tried that. Full speeds while using a cable, around 940 up/down

Hello, I have and Archer TX3000e and a Fritzbox 7590ax. 5 meters apart in clear sight. 1gbit/s glassfiber connection. For some reason I don't get full download speeds, but I do have full upload...