This PCIe to PCI Adapter Card lets you use low profile PCI expansion cards in a server or desktop motherboard PCI Express slot. Compliant with PCI Express Specification 1.0a and PCI Specification 2.2, the adapter card connects through a PCIe 1x slot to provide a low profile PCI slot in its place. A spare full size bracket for PCI Express card is also included for use in larger desktop or server PCI Express slots.A versatile solution, the adapter card converts PCIe to PCI a built-on LP4 power connector links the card to the computer power supply, allowing you to install universal voltage PCI cards (3.3V/5V).The adapter card offers an economical solution that lets you extend the usability of older or extra PCI Bus cards in newer PCIe capable systems. Specifications : Compliant to PCIE 1.0 standard 1 x 32bit 33M PCI slot Compliant to PCI 2.3 standard Support 3.3V/1A?3.3Vaux/100mA?5V/5A and 12V/500m 4 Pin ATA Power connector ( must be connected) support:Windows2000/NT/2003/XP/Vista/7, LinuxPackage contents : 1 x PCIE adapter