UEFI BIOS - U1e(UEFI BIOS)
http://uk.gigabyte.com/products/product-page.aspx?pid=3912#bios
http://uk.gigabyte.com/products/product-page.aspx?pid=3979#bios
Other Z68 boards also have the bios update
GA-Z68XP-UD3P REV 1.0 - REV 1.3(When updating from legacy to UEFI, use only the utility attached to your BIOS file)
http://uk.gigabyte.com/products/product-page.aspx?pid=3912#bios
http://uk.gigabyte.com/products/product-page.aspx?pid=3979#bios
Other Z68 boards also have the bios update