I have looked far and wide for an answer to this issue and Microsoft Support no longer answers questions for the One X.
I have both an Xbox Series X and an Xbox One X. My issue is that the Xbox One X's Download speed and Upload speed are absolutely horrid. 25.97 Mbps Down/36.53 Mbps Up. It is wirelessly connected as I am unable to hardwire it due to location issues. I know and understand that wifi is not the way to go, but it is my wife's and she doesn't play any lag-issue games. Prior to about 3 months ago, I was getting well over 100Mbps Down/Up wirelessly with it. It now will not go close to even 30 Mbps.
My setup: ARRIS BGW210-700 gateway (1Gbps Fiber): WiFi off IP Passthrough enabled Allocation Mode: Passthrough Passthrough Mode: DHCPS-fixed All Firewall settings are off.
Connected to a ROG GT-AX11000 Router: Firewall: Standard Game Boost: Enabled QoS: Gaming
Both the Series X and One X are set to gaming.
I have turned QoS off entirely and speeds dropped to 17.72 Mbps Down/23.75 Mbps Up
Gear Accelerator: On for Both the Series X & the One X Open NAT: Profiles created for Both the Series X & One X
Port 88 (UDP) Port 3074 (UDP and TCP) Port 53 (UDP and TCP) Port 80 (TCP) Port 500 (UDP) Port 3544 (UDP) Port 4500 (UDP)
Full Cone NAT Smart Connect: Enabled Wireless Mode: Auto (No other Options) 802.11ax/Wifi 6 Mode: Enable WiFi Agile Multiband: Enabled Channel Bandwidth: I have tried every configuration from 20MHz to 160MHz and even 20/40/60/80/160MHz Control Channel: I use InSSIDer and checked all channels, there is no overlap, in fact, our neighbors are so far away their wifi barely appears. Multi-User MIMO: Enabled OFDMA/802.11ax MU-MIMO: DL/UL OFDMA + MU-MIMO IPv4 DNS: 220.127.116.11; 18.104.22.168 IPv6 DNS: 2606:4700:4700::1111; 2606:4700:4700::1001 DMZ: I even put it in a DMZ and there was no change.
I've even verified that it is connecting to the 5G band. Short of Factory Resetting the Router and starting from scratch, I have no idea where I have gone wrong.
Xbox One X: Packet Loss: 0% MTU: 1480 Latency: 32 ms Wireless Strength: 100%
I did a reset on the One X, then did a full Factory Reset on it. No change in wifi speeds. The issue has to be the Router. But no other devices in the house are experiencing a slowdown.
So far for me I've found that the FW's for the AX11000 are crashable,constantly crashable. Until I was pointed to a beta,which hasn't crashed at all yet. Tried the latest - 22.214.171.124.386.45898 crashed a few times within hrs