Mailiya PCI-E to Type-C + A 5-Port USB 3.0 PCI Express Card and 15-Pin Power Connector, Mini PCI-E. This means that when you install a single video card, it will have the x16 bandwidth available, but when two video cards are installed, each video card will have x8 bandwidth each.
With several motherboards, there are only 16 lanes connecting the first two x16 slots to the PCI Express controller. The most common scenario is on motherboards with two or more x16 slots. Moreover, some slots may downgrade their speeds when their lanes are shared. With bigger slots, it is important to know if their physical sizes really correspond to their speeds. For example, many motherboards have x16 slots that are connected to x8, x4, or even x1 lanes. However, bigger slots can actually have fewer lanes than the diagram shown in Figure 5. For example, if a slot with an x1 connection is required, the motherboard manufacturer can use a smaller slot, saving space on the motherboard.
This allows reducing the size of the space needed on the motherboard. The PCI Express specification allows slots to have different physical sizes, depending on the number of lanes connected to the slot.
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