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The expansion card itself (graphics card, sound card, TV tuner, etc.) is installed in a slot on the motherboard, and an external panel of such a card with inputs and outputs is attached to the hole on the back of the case.
Motherboard form factor
The SIM card slot motherboard is a circuit board with a SIM card slot. The type of SIM card slot can vary in different motherboards.
LGA1150 Motherboard, H81 LAG1150 DDR3 with HDMI ...
However, it's essential to ensure that your motherboard and computer case can accommodate a graphics card with a 2 slot width.