Before working as a Technical Communicator, I worked for several years
as an electronics engineer. In my last job, we developed PCI-e boards.
So, if a slot is defined as graphics, it means only a graphics board can
be plugged and used in it. In fact, it is not so much a hardware
limitation than a software one (BIOS in fact). A PCI-e board must
identify itself once plugged in a slot. So the motherboard can detect
the add-on board type, its functions and characteristics and configure
itself accordingly.
As the most probable board that will be ever used in this slot is a
graphics board, the motherboard manufacturer limits its BIOS to such a
board detection and support. Time to market and design reduction cost,
as usual :-(
I could talk longer about motherboards and BIOS design "shortcuts" ;-)
By the way, most PCI-e slot under-wired are not even compliant with the
PCI-SIG standards.
IMPORTANT REMARK: according to the PCI-SIG specification, a slot as well
as a board are required to work ONLY as x1 and their maximum
configuration. Thus a x4 board inserted in a x16 slot for example must
work in a x1 configuration but not necessarily in a x4 configuration as
the slot may work only as x1 and x16 (depending on its design).
Regards,
André
ASTeC a écrit :
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