ok, sooo i have had this graphics card ( GeForce 6600 AGP-8X 256mb ) for a few months and kept on woundering why it srewed up, but now I think I have finally found it out, On my GeForce 6600 properties it says "Location: PCI bus 1, device 0, function 0" , so how do I change it from PCI to AGP?

Cheers

You don't. The PCI bus is the part on the computer that handles all the data coming to and from your graphics card and the rest of the system.

If you go to the View Menu in Device Manager and choose "Devices by connection", then expand the first plus sign and the second plus sign, there will be a plus sign next to PCI Bus. Expand that, and notice how pretty much everything is underneath the PCI Bus, including your graphics card. If there was no PCI bus, you would have no computer at all.