EVGA Z590 FTW WIFI (121-RL-E597)
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* There are two numeric references for PCI-Express: one is mechanical (the actual slot-
length footprint across the motherboard), while the second is electrical (the number of
PCIe lanes available to the slot from the CPU, PCH, or both).
PCI-Express was designed with a universal architecture in mind; e.g. you can
install x1 cards, such as sound cards or USB controllers, into an x16 slot. Many
types of cards can use various numbers of PCIe lanes; similarly, some
applications might only use certain parts of a card (e.g. compute apps), requiring
only a single PCIe lane to accomplish its task without affecting performance.
This is why there are x16 mechanical slots with an x1 electrical PCIe lane. Using
the entire length of a PCIe slot is unnecessary, nor does it cause an adverse
effect to use a shorter form-factor bus card in a slot that physically can hold a
larger form-factor bus card.