A Question about 802.11ac and Speed on Windows 7

I have a Draytek 2860ac Router which operating at 5Ghz with 802.11ac. I have tried to connect to it with several 11ac Adapters on WIndows 7 but I only seem to get a speed of  86Mbps. (see Attachment)

I think the problem may be related to the fact that the radio type is detected a 11n rather than 11ac but I am certain that the Router is configured as 11ac/5Ghz as I have checked it with Draytek support.

What could the problem be?
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Craig BeckCommented:
How far from the router are you?

What channel-width is the router set to use? 20/40/80??

Is there any other 5GHz RF in the area?

Can you post screenshots of the router config pages please?

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ChrissycanAuthor Commented:
Changed channel - works perfectly now
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