Features: 1.PCI Express x1 channel, 2.5 GHz signaling. SSCECRC and advanced error reporting capabilities. 2.100 MHz differential PCI Express reference clock input. No PCIe ASPM support. The maximum payload size is up to 128 bytes. 3.PCI function Supports 33 MHz PCI bus, supports 3 PCI masters station, and supports for CLKRUN. 4.The ASM1083 PCI Express x1 to PCI 32Bit adapter card allows users to connect legacy parallel bus devices to advanced serial PCI Express interfaces. 5.The card can be easily installed and powered from a PC power supply via the included 4-Pin for Molex connector. 6.The aperture in the bracket will help you reach the PCI card inside the chassis or connect different devices. specification:Item Type: Adapter Board PCI Express Base Rev. 1.0a / 1.1 PCI bus power management interface Rev.2.0 PCI Express Card Electromechanical Rev.2.0 PCI Rev.3.0 PCIE to PCI / PCIX Bridge Rev.1.0 Operating System: For Windows 2000/NT/2003/ XP/Vista/2008/Win 7 & for Linux PackageList:Adapter Card x 1