I have just upgraded from my good old trusty Asus Maximus VIII Hero (with a 6700K CPU) to a brand new Asus Maximux X Hero (with a 8700K CPU). It was probably the best motherboard i ever had. Although i used to have a ton (over 20) of USB devices connected to my old Hero VIII, everything worked flawlessly for years!
After the upgrade, almost nothing works when it comes to USB ports. Even my old beloved Dell Multimedia USB Keyboard... i can't even use it to enter BIOS!!! I can only use it after it boots up in Windows (it's like it doesn't get power untill a driver loads). I have tried a few keyboards, none of them were recognized at boot time, so i couldn't use DEL or F2...
I have managed to flash the latest 1003 BIOS for Maximus X Hero, hoping there is a fix for USB issues. But nope! I have also did a CMOS reset, unplugged all other USB devices. Still wasn't able to use my keyboard or my mouse (Logitech G502) in BIOS.
Also, even i only have one mouse and one keyboard connected, at boot time i can see something like this: "USB Controllers: 3 XHCIs / USB Devices: 2 Drives, 4 Keyboards, 3 Mice, 5 Hubs". 4 Keyboards and 3 Mice?!? What in the world? Where does that coming from? I don't even have so many keyboards and mices in my whole house...
Also, strange things happen to my two USB external HUB's (Anker AH241 USB 3.0 Aluminum 13-Port Hub and Icybox IB-AC6702 USB 3.0 Hub). After booting up and enter Windows, i have to reset both hub's, as some of my devices do not fully work. That never happened with my old Maximus VIII Hero.
I have tried all drivers (Intel Chipset drivers + USB 3.x drivers) from the official Asus page, and then tried the latest Intel official and un-official drivers. Also i have been using the latest ASMedia ASM2142 USB 3.1 xHCI Controller drivers.
I do not know what to do next. Initially i wanted to get a replacement for my Maximus X Hero motherboard, but as i have read in the forum, a lot of other people are experiencing USB problems.
Could this be fixed with a new BIOS? New drivers? Some firmware patch for the USB chipsets? Or is it a design flaw and i would better give up and return the motherboard?
Any advice would be apreciated. Thanks in advance!