StarTech.com 4 Port PCI Express PCIe Serial Combo Card - 2 x RS232 2 x RS422 / RS485. Host interface: PCIe, Output interface: Serial, Serial interface type: RS-232/422/485. Chipset: SystemBase SB16C1052PCI, FIFO (First In, First Out): 256 B. Windows operating systems supported: Windows 2000, Windows 2000 Professional, Windows 7 Home Basic, Windows 7 Home Basic x64, Windows 7.... Width: 125 mm, Depth: 70 mm, Height: 20 mm. Package width: 146 mm, Package depth: 210 mm, Package height: 41 mm