The PEX2S5531P 2S1P PCI Express Card turns a PCI Express slot into two RS232 (DB9) serial ports & one Parallel port The Adaptor card features a native PCI Express single chip design that means that you can take advantage of full PCI Express capability providing enhanced speed & reliability while reducing the load applied to the CPU by as much as 48 over conventional serial cards which use a bridge chip design Compatible with a broad range of operating systems including Windows 2000XP2003 Vista Windows 7 Server 2008 R2 (32 & 64-bit) Linux Kernel 2611 & up & MAC OS 104 this 2 Port Serial 1 Port Parallel PCI-Express Card also features an optional low profilehalf-height bracket that allows the card to be installed in virtually any computer case regardless of the case form factor Features Two high speed RS232 serial ports with data transfer rate up to 4608 Kbps One parallel port with data transfer rate up to 15 Mbps Compliant with PCI Express base specifications revision 10a 128-byte deep FIFO per transmitter & receiver Configurable in 5V 12V & RI (non-powered) modes Selectable power output on pin 9 for the serial port Native single-chip single lane PCI Express Automated out-of-band flow control using CTSRTS & DSRDTRBarcode 0065030841764 Form Factor Parallel Adaptor