I had this happen on a brand new Asus 27" monitor. I was trying to setup the fan curve on delivery of this new system to a customer. The good part is that this same customer was buying 2 identical desktops but two different Asus 27" monitors (both HDMI) and you know what...? The 2nd Asus monitor would display the BIOS settings just fine. The first one did what yours did ....out of range!