"All bios features unlock" (All menu unlock) BIOS mod for HP3400 (H-Cupertino2-H61-uATX 1.02) How to fix new NVidia GPU (1050/1060/and newer): Advenced -> PCI subsystem settings -> PCI Rom Priority -> Legacy ROM [ F10 ] for save, then File -> Save and Exit. After this - install new GPU end enjoy you PC!