I have an intel m5 compute stick with the 8260 wireless chip in it. It won't connect to a netgear AC1750 R6400 router at 5GHz but will at 2.4. It connects to a google onhub router, but the connection is unusable. Web pages error out and running windows update takes 4 hours instead of a few minutes.
I ended up returning it to the seller as defective, but he's being a jerk about it. He said it didn't work for him either but after he played with it for 2 hours he set the roaming aggressiveness to '1' and it worked after that, so he's trying to declare it not defective.
I can't find other people with the same problem, and I'd imagine there would be plenty if this was a common problem with the device.
I have just the one router and none of my neighbors are anywhere near close enough for their 5GHz signals to be causing any interference. I also have almost 30 clients, wired and wireless, at both 2.4 and 5GHz and never had a problem like this before.
It looks like roaming aggressiveness just has the device constantly look for a stronger signal and to reconnect if one is available, so I'm guessing its helping out what is probably a bad antenna connection.
I posted this in the compute stick section as well, but I know the 8260 is used in many devices and its a wireless specific issue, so I figured I'd post here as well.
What do the experts think?