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Item#: N82E16815158166

StarTech 8 Port Native PCI Express RS232 Serial Adapter Card with 16950 UART Model PEX8S952

  • PCI Express to Serial Port Card
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The PEX8S952 8 Port Native PCI Express RS232 Serial Adapter Card with 16950 UART allows you to turn a PCI Express slot into eight RS232 (DB9) serial connections using the included breakout cable.

The serial card is based on a native single chip design that allows you to harness the full capability of PCI Express(PCIe), providing optimum reliability and speed, and reducing the load applied to CPU by as much as 48% over conventional serial cards.

The RS232 Serial Adapter Card is compatible with a broad range of operating systems, including Windows, Linux, and MAC OS for easy integration into mixed environments.

  • newegg Add Serial Ports to PC Based on native single-chip, high performance dual channel Oxford 950 UART design, the StarTech PEX8S952 card adds 8 RS232 Serial Ports to any PCI Express equipped computer for easy connection to various peripherals.
  • newegg PCI Express Interface The use of PCI Express interface enables fast, bottleneck-free data transfers. It has 8 high speed RS-232 serial ports with data transfer rates up to 460.8 Kbps.

Learn more about the STARTECH PEX8S952




PCI Express to Serial Port Card
External Ports
8 x Serial Ports
Operating Systems Supported
Windows 2000, XP (32-bit, 64-bit), Vista (32-bit, 64-bit), Linux Kernel 2.4.x and 2.6.x


128-byte deep FIFO per transmitter and receiver
Automated in-band software flow control using programmable Xon/Xoff in both directions
Automated out-of-band hardware flow control using Tx/Rx/RTS/CTS/DSR/DTR/DCD/RI/GND
Compliant with IEEE1284, SPP/EPP/ECP parallel port
Compliant with PCI Express base specifications revision 1.0a
Eight high speed RS-232 serial ports with data transfer rate up to 460.8 Kbps
High Performance Dual Channel Oxford 950 UART
Native single-Chip, single lane PCI Express
Selectable power output on pin 9 for the serial port

Manufacturer Warranty

1 year limited
1 year limited

Quick Info


  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year

Customer Reviews of the STARTECH PEX8S952

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  • Jonathan M.
  • 2/11/2012 6:13:43 PM
  • Tech Level: Somewhat High
  • Ownership: less than 1 day

4 out of 5 eggsWorks

Pros: Worked with Debian Lenny. It is necessary to append "8250.nr_uarts=10" (without quotes) to the Linux kernel command line (e.g., in /boot/grub/menu.lst or in /etc/default/grub) so that the kernel expects a high enough number of serial ports. 10 is chosen above assuming 2 built-in serial ports. I'm using mine in an HP ProLiant M110 G7.

Cons: In my system, the mapping from physical ports to /dev/ttyS* is as follows:
Cable 1 - /dev/ttyS4
Cable 2 - /dev/ttyS5
Cable 3 - /dev/ttyS6
Cable 4 - /dev/ttyS7
Cable 5 - /dev/ttyS8
Cable 6 - /dev/ttyS9
Cable 7 - /dev/ttyS2
Cable 8 - /dev/ttyS3
... not very intuitive.

Other Thoughts: I haven't had it in use long enough to comment on reliability.

1 out of 2 people found this review helpful. Did you? Yes No

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Computer Hardware > 
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Item#: N82E16815158166
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