ASUS BE92U slow NAT

[jala]

I just switched my AC88U for a BE92U, I have a fiber connection right on the WAN port, and have 1Gb up/down. This is also the speed I could measure when doing a speed test from the inside NAT on my AC88U.
Now with the new BE92U, I can measure 1 Gb when doing the speed test from the BE92U menu, but from the inside behind NAT i get maximum about 320 Mb.
I have switched of everything that could interfere, so no Trend, QoS or anything, still very slow. I tried both stock ASUS and Merlin 3006.102.5 firmware, exact same result.
Did I just buy a bad product? Will future firmware potentially adress this?

 

[Poul Bak]

Factory reset the router (using the reset button on back)!
I can do 940/940 through my RT_BE92U (I also have a 1GBit/1Gbit fiber connection).