Hi and welcome to the Gigabyte UK Forum.
I won't ask which Hackers film the username came from
I can only assume that the file you uploaded for the BIOS to display was the wrong size or formatted wrongly or something similar.
You can try doing the CMOS clear again but make sure that it is cleared this time by removing the power cable from the mains supply and then press the power switch on the case for a few seconds just to drain any residual energy in the PSU capacitors.
Once done remove the motherboard battery for at least ten minutes before replacing it.
Next plug back into the mains supply and boot.
You will now need to enter the BIOS by pressing
DEL and load
Opimised BIOS Defaults.
Go to the page for the booting up section and select quick boot and disable fullscreen logo
Make any other changes to the BIOS settings to suit your self and then press
F10 to save and exit.