I have the card ordered on Thursday and on Saturday they came already - the delivery was ever good!
After that it went straight to install, install drivers, and only the 2.4 GHz band has been showing me. Yes I thought so comical, that should now not but be so. Tried calling customer support, then came the next bust, who had only Monday - Friday 10 - "open" 17 clock. So I phoned Monday. They could not really help me also. The support person then came to the conclusion point that but the 5 GHz band is defective. I then googled a little further, because I simply did not want to admit it: D. Lo and behold, I found something after 2 hours.
My router was configured (by the way a Speedport W724V Type A) as follows:
2.4 GHz band - transmission mode 802.11b + g + n; Speed max. 300 Mbit / s; Channel Automatic
5 GHz band - transmission mode 802.11ac; Speed max. 1,3Gbit / s; ---> Automatic channel
A description was not the map namely, and therefore can expect that they will support only those channels yes no.
Now everything runs as desired, I am connected to s ~ 702Mbit / to the router, the distance is about 5m by 30cm but I have to reinforced concrete.
I hope I can some help with any problems.
mfg Dominik