StarTech.com 4 Port Native PCI Express RS232 Serial Adapter Card with 16550 UART Low Profile (PEX4S553)

Four high speed RS232 serial ports, with support for data transfer rates up to 128000bps Native single-Chip, single lane PCI Express 256-byte deep FIFO per transmitter and receiver Includes half-height, low profile mounting brackets Built-in 16C450,550 compatible UART