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The StarTech PCI1PEX1 adapter card converts a legacy PCI slot into PCIe x1 slot, thus you can use newer PCI Express cards on an older PCI-only system. It provides a versatile and economical solution for extending the usability of older PCI motherboards or using low profile PCIe cards that do not have PCI equivalents, saving you the hassle and cost of upgrading to a new system. This adapter card works with low profile/half-height card and, when paired with it, fits into full-height PCI system. An innovative bracket design adapts and secures the low profile PCI Express card into the converted slot. A spare, full size bracket is included for installation in larger desktop or server expansion slots that can accommodate a full-sized card.