StarTech.com 2 Port PCI RS232 Serial Adapter Card with 16950 UART - Dual Voltage (PCI2S950DV)

Dual Voltage ensures compatibility with both 3.3 and 5.0 volt PCI slotsStandard and low profile bracket included allowing installation into almost any systemTwo high performance 16C950 UART channelsMaximum data transfer rate of 460 Kbps128-byte deep FIFO per transmitter and receiverPCI 3.0 and Power Management 1.1 compliantAutomated in-band software flow control using programmable X on/Xoff in both directionsAutomated out-of-band hardware flow control using RTS / CTS and/or DSR / DTR