We have the AC 1600 (AE6400) linksys Router and have many devices hooked up to it that work perfectly fine ie. iPads,Tvs, and older computers our problem is with our new laptops and tower computers with 802.11ac and 802.11n adapters in them.
The newer ones will randomly drop and be unable to reach DNS server and the router needs to be rebooted but it also runs slow from the new ones at kilobits a second even if it is only thing connected but everything else runs at 7Megabits a second.
Any idea what could be causing this?