Startechcom 2 port pci express pcie to rs 232 serial cards startechcom pex2s952lp the startechcom pex2s952lp pci express serial card turns a pci express slot into 2 x rs 232 db9 serial connections the card is constructed using a native single chip design that lets you harness the full capability offered by pci express pcie while reducing the load applied to the cpu by as much as 48 over conventional bridge chip serial cardsthe pci express rs 232 serial adaptor card is compatible wi