If I want to use the Z77-DS3H UEFI BIOS (F9), I must use a non Apple Cinema Display monitor. Using the ACD, I have a reduced size BIOS LOGO screen with a big black board around it. Using the DEL KB key gets a picture like this guy had: My Gigabyte GA-Z77MX-D3H has some SERIOUS BIOS issues. The UEFI BIOS works upon connecting to another non ACD monitor. A search on Google brings up lots of posts on multiple forums with this problem.
I have a GA-Z68X-UD3H w/o the UEFI BIOS (it's the F12 Award BIOS) which works as it should.
So, it's the UEFI BIOS. Hopefully, Gigabyte can release a fix, like ASAP.
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