Revisions of the PCI standard have added new features and performance improvements, including different bus speeds and bus widths.
Don't worry, you're not alone!
A PCIe x8 card will fit in any PCIe x8 or PCIe x16 slot.
What is the function of a PCI slot?While not very common, an external version of PCI Express exists as well, unsurprisingly called.These can come in the form of sound cards, raid cards, SSDs, graphics cards, Coprocessors, and several other functional computer parts.And this is a picture of a slot like the one i have on my computer.PCI Express, technically, peripheral Component Interconnect Express but often seen abbreviated as, pCIe.
This guide describes differences between these slot types and their sub-types.
In general, a larger PCI Express card or slot supports greater performance, assuming the two cards or slots you're comparing support the same PCIe version.

Because of this, PCI Express won't continue to reign supreme resting on its laurels.PCIe, pCIe (PCI Express) is the more recently introduced standard for connecting devices to computers.Here are links to the sound cards.For higher potential bandwidth, PCIe devices and systems can optionally support links using multiple simultaneous lanesfor example, a "x16" link uses 16 lanes.External PCI Express but often shortened to ePCIe.Some PCIe hard drive controllers even include the SSD built in, drastically altering how storage devices have traditionally been connected inside a computer.The following summarizes the differences in potential bandwidth between the various slot types.Other devices typically don't require the high potential bandwidths provided by such a connection.If it physically fits, it probably works.
This way, they always arrive in the intended order, and nobody will have to cross again.

In a parallel interface, 10 of the people will cross at once.
PCIe Versions:. Any number after PCIe that you find on a product or motherboard is indicating the latest version number of the PCI Express specification that's supported.
In fact, the PCI-SIG is developing a cabling specification to allow external devices to be connected to a computer using the PCIe standard.