DELETED_96987

You want to leave two command windows open each running a continuous ping.

One to your router (the gateway address) and the other some somewhere external (e.g. 8.8.8.8).

When the network next drops out while gaming check both pings. Did they both fail or only the external?

You'll then know if it's a LAN or WAN problem.
 
So it isn't a simple WAN side problem.

Do you have another device connected to the router you could leave a ping running on at the same time? If your PC drops out but the other device doesn't you'll know for sure it isn't a router issue.
 
You'd need an app. Searching for ping on the App Store finds a few likely candidates ('Ping - network utility' looks okay).

Have you checked your PC's event logs for anything at the time of the disconnect?
 
I had a similar issue with my onboard nic recently, only I had to disable the nic and re-enable it every time it dropped the connection. Very annoying. I know it wasn't an OS issue so I bought an Intel pcie nic and it's not dropped once since.
 
I would have a look in the Advanced Tab of your NIC's Properties in Device Manager (Intel has a lot of settings) for anything that sounds like it could be causing this (also other Tabs like Power Saving etc).
 
I doubted it was your Intel NIC that was faulty, I have the older 17.

I have read above and tried to again but not had sleep so far but have you tried leaving another WIRED device plugged in to the port your PC currently uses and see if it also has disconnection issues.
 
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