I've been using my build for 2 weeks now and today I wanted to started playing some FPS games together with a friend, and the lag was unbearable.
After investigating I found out that this new build is the only pc with problems.
PC IS running windows 10 enterprise, build 1803 (same issues with build 1709), Core i7 8700k, 32GB ram, etc all without problems, no overclock (yet).
I have 2 other pcs in this room, all connected to the same ASUS RT-AC88U router. All of them get 200-300 mbps on fast.com in terms of throughput. However, my connection from this motherboard's onboard RealTek PCI-E wifi card is showing issues. First I debugged my modem (no issue there), router (no issue there, but reset to factory default to make sure).
To rule out any other issues: I have the maximus-pc and my intel NUC on the same table, and I'm simply 'pinging' the router. Same network. Same 5Ghz, same distance to the router.
Result - This perfectly explains how my experience during games is.
I've tried stock windows 10 drivers. I've tried the drivers that Asus provides. I've even tried the drivers from RealTek themselves, but still no change.
Does anyone have any idea? I really don't want to pull my build apart and lose my mobo for 3-4 weeks....