specification: Chipset: PXE8112 Compliant with PCI Specification Version 2.3 PCI 32-bit card for PCI Express x1, x4, x8 or x16 PCI Express 1 port (1 virtual ), 2.5Gbps Compliant with PCI Express Specification Version 1.0 Combination low profile PCI 32-bit host card Support PCI slot 3.3V / 1A, 3.3Vaux / 100mA, 5V / 5A and 12V / 500m Plug and play application: Server 2000 / NT / XP / Vista / Win 7, Linux Available PCI slots colour: black-green material: ABS + metal size: 131 * 87 * 30mm Package Contents: 1 x conversion card 1 x short iron piece Note: This product does not require a driver. Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. PEX 8112 supports forward and reverse bridges as defined by the PCI to PCI Express / PCI-X Bridge Specification 1.0. In forward mode, allows legacy PCI chips and adapters to be used with the new PCI Express processor system. Reverse bridge operation allows traditional PCI processors and chipsets to configure and control advanced PCI Express switches and endpoints. product description: In contrast, the PEX 8112 not only allows downstream PCI Express systems to be fully configured from the PCI bus, but also handles limited PCI Express root functions for reverse interrupt and power management events.