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PCI configuration space
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<p>PCI configuration space is the underlying way that the <a href="/facts/Conventional_PCI/n6CGuFvP">Conventional PCI</a>, <a href="/facts/PCI-X/toN6KtKy">PCI-X</a> and <a href="/facts/PCI_Express/ADhsLCUK">PCI Express</a> perform auto configuration of the cards inserted into their bus. </p>