StarTech.com 2 Port 16550 PCI Express Serial Card, PCIe, 0.353 oz (10 g), 6 oz (170 g), Wired, 92 x 120, Windows 2000/XP & Server 2003 StarTech.com 2 Port 16550 PCI Express Serial Card. Host interface: PCIe. Weight: 0.353 oz (10 g). Package weight: 6 oz (170 g). Connectivity technology: Wired, Dimensions (WxDxH): 92 x 120, Compatible operating systems: Windows 2000/XP & Server 2003