Best Connectivity SD-PEX50030 2-Port RS-232 Serial 1-Port Parallel PCI Express x1 Controller Card * General Features: MosChip MCS9901 chip Compliant with PCI Express 1.0a specifications * Single-lane PCI Express x1 throughput rates of up to 2.5 Gbps Two (2) RS-232 Serial ports * One (1) IEEE 1284 compatible parallel port on internal header * Compatible with industrial standard 16C450/16C550 UART