StarTech. com 4 Port Serial RS 232 PCI Express Interface Card PCIe with Octopus Cable x DB 9 (Male)

Native single chip design Includes a full profile and low profile/half-height bracket On chip 256-byte depth FIFO in transmit/receive path of each port Single-Lane (x1) PCI-Express with throughput up to 2.5Gbps Supports hardware and software flow control