You don't need to uninstall the drivers, by disabling the device windows will remove it. (well, not completely, it'll still have the drivers in the system. But it won't have any adverse effects)
Yes, in the phoenix bios under integrated peripherals, you should be able to disable the onboard video.
Edit: You need to disable the card itself, not the memory. There should be another option.
Yes, in the phoenix bios under integrated peripherals, you should be able to disable the onboard video.
Edit: You need to disable the card itself, not the memory. There should be another option.