Compliant with PCI- Specification Revision . PCI- Single-Lane (x1) bus bandwidth 2.5Gbps Support for DOS, 8 / 7 / / / 2000 / Server 2003-2008 32/64-bit, and other operating systems Parallel interface (LPT) I/O address: assigned by BIOS IRQ: Assigned by BIOS Support for SPP, , EPP & ECP and mode Serial interface (RS232) Compliant with industry standard 16C450/16C550 UART The chip has a built-in 256-byte FIFO and on-chip H/W, S/W control function. The data transmission rate of each serial port can 250Kbps (customized data transmission can 1Mbps) Baud rate: 230.4Kbps Serial parameters Data bits: 5, 6, 7, 8 Stop position: , 2 Parity: None, Even, Odd, Space, control: RTS/CTS, XON/XOFF I/O address: assigned by BIOS IRQ: Assigned by BIOS Serial for RS-232: TxD, RxD, RTS, CTS, DTR, , DCD, GND Package List: x Riser Card x Cover Board x Serial Cable Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.