The pex8s1052 8 port low profile pci express rs232 serial adapter card w 161050 uart lets you add 8 rs 232 serial ports to your computer through a single low profile pci express slot supporting data rates up to 4608 kbps the pci express serial port card offers a high performance 16c1050 uart and a large 256 byte transitreceive fifo buffer that work together to provide high speed serial communication while reducing the overall load on the system cpu suitable for most standard computer chass