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ROG Maximus xi code CPU ERROR at boot

Level 7

Hi everyone,

I have a ROG Maximus xi code that has recently lost the ability to see its video card. I set bios to optimised defaults in an attempt to try and get the video card recognised.

Now I get a "CPU Fan Error!" at every boot.

The system has a cooler master water cooling set up so I do not have anything connected to the CPU_FAN header. I have been through the bios about 5 times trying to see where to tell it that I run a pump and radiator and do not have a CPU fan. I may be wrong, but I am assuming this is the issue.

I must have selected something in the past to fix this but I do not remember what it was.

Any help would be greatly appreciated, thank you.


Level 7

okay I found the setting under Monitor "CPU Fan Speed" can be set to ignore.

I have now attempted to put my GPU back in, the BIOS was not seeing the card at all. I have put the card into pci slot 2 and can see the card. I booted from here with the display still connected to the motherboard hdmi and installed the latest video drivers for the card. The card is a TUF 3-RX5700XT-08G-GAMING. Drivers installed successfully and I rebooted the machine. It boots and works with the monitor connected to the on board hdmi, but not with the hdmi connected to the video card.

Super Moderator

Hi there,

The board has a Q-LED reader. Can you specify what Q-CODE is displayed when the GPU is inserted?

13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090