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Item#: N82E16815158087

StarTech 4 Port PCI Express 16C950 Serial Card Model PEX4S950

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  • PCI Express to Serial Port Card
  • 115Kbps Data Transfer Rate

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

This PCI Express Serial Adapter card can be installed into any PCI Express slot on a computer, to provide four high performance 16C950 RS232 serial UART channels/ports - a convenient solution for connecting modern or legacy serial devices with support for data transfer rates of up to 460 Kbps.

The serial adapter card is easy to install, with support for Windows 2000, XP, 2003 and Vista. Plus, the card features IRQ sharing and supports plug and play serial device connections, guaranteeing convenient, hassle-free installation.

  • newegg Add Serial Ports to PC Based on high performance 16C950 UART design, the StarTech PEX4S950 card adds four RS232 Serial ports to your 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. Data transfer rates of up to 115 Kbps allow for peak serial device performance.

Learn more about the STARTECH PEX4S950




PCI Express to Serial Port Card
External USB Ports
PCI Express
External Ports
4 x Serial Ports
Data Transfer Rate
Operating Systems Supported
Windows 2000 / 2003 32-bit or 64-bit / WindowXP 32- bit or 64-bit / Vista / Vista 64-bit, or Linux


high performance 16C950 UART channel
PCI 2.2 and PCI Power Management 1.0 compliant
Supports 4 RS232 over one single PCI Express Slot
UART’s fully compatible with 16C550 type devices
Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year
  • Read full details

Customer Reviews of the STARTECH PEX4S950

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  • Leonid Y.
  • 9/19/2008 9:12:38 AM
  • Ownership: 1 month to 1 year

5 out of 5 eggsGreat Device

Pros: We bought one of these for sub hundred and one from National Instruments that was USB to 4/RS232 for three times as much. Well the one from NI has died, and they want to charge $200. So that NI one goes to the trash, and I go to NewEgg to buy another one of these.

Cons: None

Other Thoughts: On the computer, the COM ports are randomly assigned. If you go into hardware manager, you can change the ports. Some programs require com ports <10, so I try to fill all spots starting with 1.

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

  • stephen H.
  • 8/13/2008 11:08:53 PM
  • Ownership: 1 day to 1 week
  • Verified Owner

3 out of 5 eggsOK, but not on Linux

Pros: Works fine with Windows

Cons: Did not work for me on Ubuntu Linux (2.6.25). Card was recognized and with some work i was able to have all ports recognized, however all tty devices were hooked together. In other words, /dev/ttyS5 and /dev/ttyS6 both connected to the same port. Google search showed others with similar problems.

Other Thoughts: Poor docs, poor support, non functional driver on Linux. If you need a card for Windows it works fine.

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

  • Jeff M.
  • 7/22/2008 12:32:27 PM
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsAwesome Product

Pros: This is a great card to turn a PCIe slot into 4 RS-232 ports. Unfortunately most of the commercialy available PC's are short on PCI slots these days. We use Rimage Protege 2 duplicators in our Duplication lab. We attach 4 autoloaders to 1 PC. They need both firewire and RS-232 ports to communicate and this was always done with PCI cards. The PC's must have 4 PCI slots but most only come with 2. I now use the 2 PCI slots for the firewire cards and the PCIe slot for this sweet little card. It worked great. No driver issues, everything was on the install disc. No program to install, just find the driver and away you go. I am going to buy a bunch more of these cards right now.

Great Product!

Cons: None that I can find. Great Card.

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Item#: N82E16815158087
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