So i have 2 graphics card the onboard one Radeon HD and i have a nvidia gpu when i connect my vga to the motherboard gpu it works and detects the radeon hd dispaly driver. When I change the settings to BIOS and make it to PGE or somehow idk what its called., I transfer the VGA to the gpu vga and the monitor shows nothing. When i put it back to the motherboard but in the BIOS is still the PCI Slot/PGE slot setted., It somehow works and still detects the radeon hd.