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 and up, 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.
Pros: I am giving this three eggs because this card was easy to install, supported by older and current OSs and their technical support was surprisingly easy to access and helpful - confirm using the latest driver, re-seat the card, try a different PCI-e slot/computer, get another card.
Cons: I am not giving it five eggs because it only worked for two days before starting to fail - it would drift in and out of being recognized by Windows XP and eventually was unresponsive after about a week.
Other Thoughts: Now it is up to Newegg's RMA process to get a replacement and see how it performs.
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“I am giving this three eggs because this card was easy to install, supported by older and current OSs and their technical ...”— drandrae 8/30/2011