StarTech 2 Port Native PCI-E RS232 Serial Adapter Card PEX2S952 The PEX2S952 PCI Express based serial card turns a PCI Express slot into 2 RS-232 (DB9) serial connections. The adapter card is based on a native single chip design, that allows you to harness the full capability of PCI Express (PCIe) - providing optimum reliability and speed while reducing the load applied to the CPU by as much as 48% over conventional (bridge chip) serial cards. The RS232 Serial Adapter Card is compatible with a broad range of operating systems, including Windows and Linux (Kernel 2.6.11 to 4.11.x). Plus, the adapter card includes an optional half-height/low profile bracket that allows the card to be installed in virtually any computer case - making it that much easier to add serial ports to a PCI Express enabled computer, regardless of the size of the computer case. Ports & interfaces Host interface: PCIe Output interface: Serial Expansion card standard: PCIe 1.0 Serial ports quantity: 2 Serial interface type: RS-232 Peripheral (Molex) power connectors (4-pin): 1 Design Internal: Yes Product colour: Green Mean time between failures (MTBF): 87600 h Certification: CE, FCC Features Chipset: PLX/Oxford - OXPCIe952 Baud rate: 460.8 Kbit/s FIFO (First In, First Out): 128 B Data bits: 4, 5, 6, 7, 8 Stop bits: 1, 1.5, 2