PCI Express - What You Really Need to Know!

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Executive Summary

The PCI Express standard is very flexible. A plug-in card can be fitted to any slot which is at least as large as it is. For example a x1 card will function in a x1, x4, x8 and x16 slot. Slots don't have to be electrically wired with the full compliment of lanes, as long as the electrical power and ground connections are tracked in. It is common for products to have x8 or x16 physical slots which are only x4 and x8 respectively. For this reason, it is always necessary to read the fine print of the product specification.

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