The maximum amount of physical memory that can be installed on this device is 16GB.
A discrete device/component is not installed directly on the motherboard. See Discrete Graphics Card.
If you had installed anything in the PCI-E or any kind of Drive, it will lose all of the hardware configuration to that device. Overall, no performance enhancement will be made. In rare cases, Performance will increase by 1%-3%.
yes.
peripheral
Depending on your device, device drivers are either automatically installed by Windows, or manually updated by the user.
Neither, BIOS does not list device drivers at all.
Device Manager>System>Hardware
the Device Manager
there is not a device made that man kind knows about
External Devices
As we do not know what device you are referring to nor what programs and applications are installed we cannot answer