Vista - switching to discrete GPU card in bios

in my bios, under "graphics/primary video controller" I have 4 options.

they are:
GFXO-GPP-IGFX-PCI
GPP-GFXO-IGFX-PCI
PCI-GFXO-GPP-IGFX
IGFX-GFXO-GPP-PCI

These appear to be all the same things, just listed in different orders, so Im gonna assume I leave it in "auto" under display port adapter settings, and it will use these choices in the order selected?

what are all these choices and how can i have 4 of them?


i have no video card installed at the moment, and according to my mother boards manual, to switch from discrete graphics card to on board graphics you do it through ATI catalyst application from the desktop and not through the BIOS. Is anyone familiar with this? if thats correct, what are the above selection stand for?

PCI-GFXO-GPP-IGFX = pci gfx card
IGFX-GFXO-GPP-PCI = integrated card

If I am wrong please let me know.

I was told this in another thread, I believe it to be correct:

gfxo = pciexpress , gpp = gaming port , igfx = internal graphics and pci = pci card.