StarTech 2 Port Native PCI Express RS232 Serial Adapter Card with 16550 UART

The PEX2S553 PCI Express serial card lets you turn a PCI Express slot into 2 RS232 (DB9) serial ports. Based on a native single chip design (no bridge chip), this 2-port serial adapter card allows you to harness the full capability offered by PCI Express (PCIe), and reducing the load applied to the CPU by as much as 48% over conventional serial cards. The RS232 Serial Adapter Card (PEX2S553) is compatible with a broad range of operating systems including Windows® 2000/XP/2003/Vista™/Windows 7/Server 2008 R2 (32 and 64 bit), Linux Kernel 2.6.11 to 4.11.x, and MAC OS 10.4 and above. Plus, the serial card includes an optional half-height/low profile bracket that allows the card to be installed in any PCI Express slot, regardless of the size of the computer case. This product is a replacement for our PEX2S552 card. Backed by a StarTech Lifetime warranty and free lifetime technical support.Two high speed RS232 serial ports with support for data transfer rates up to 460.8 KbpsCompliant with PCI Express base specifications revision 1.0aIncludes half-height/low profile mounting bracketSelectable power output on pin 9 for the serial port128-byte deep FIFO per transmitter and receiverNative single-Chip, single lane PCI Express