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Item#: N82E16815124084

SYBA PCI-Express 1-Port DB9 RS232 Serial Card with Low Profile Bracket - RoHS Model SD-PEX15021

  • PCI Express to Serial Port Card
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Learn more about the Syba SD-PEX15021




PCI Express to Serial Port Card
External Ports
1 x Serial Port
Operating Systems Supported
Windows 2000, XP 32/64-bit, Server 2003 32/64-bit, Vista 32/64-bit, Server 2008 32/64-bit


PCI-Express RS232 1x Serial Port with MSC9901 Chipset
Fully compliant with PCI-Express Base Specification Revision 1.0a
Single-Lane (x1) PCI-Express with throughput up to 2.5Gbps
Low profile ready with extra low profile bracket
Compatible with industrial standard 16C550 UART
On chip 256-byte depth FIFO in transmit
Transfer data rates up to 250Kbps on each port
Supports hardware and software flow control
Supports 5, 6, 7, 8-bit serial format

Quick Info

Customer Reviews of the Syba SD-PEX15021

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  • Stewart L.
  • 12/23/2013 9:00:30 AM
  • Tech Level: Somewhat High
  • Ownership: less than 1 day
  • Verified Owner

5 out of 5 eggsWin 7 Pro 64 bit driver update

Pros: An update to rkb's review on 6/17/10, the supplied CD install disc now includes the current driver for Win 7 Pro 64 bit. It installed perfectly and works fine. The driver on the disc is the current Ver I checked the page for the MCS9901 driver and their file Windows 8.1/8.0/7/Vista/XP 64-bit Driver is also Ver Use this website to check for future versions.

Cons: None

Other Thoughts: You can't beat the price with free shipping.

Did you find this review helpful? Yes No

  • Jose l.
  • 8/4/2011 12:41:06 PM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsWorks great

Pros: inexpensive, easy to install, works just fine.

Cons: none

Other Thoughts: Ordered 10 so far, ordering 6 more soon. Using with XP for the moment, will be moving up to 7 in a few months.

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

  • Robert B.
  • 6/17/2010 7:31:18 AM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

4 out of 5 eggsWindow 7 64-bit Compatibility

Pros: Works fine under Win7 64-bit with v1.0.0.10 drivers downloaded directly from the chipset maker. Go to and search for dirvers for the MCS9901 chipset. Get the WHQL certified Windows driver set.

Cons: Will not work under Windows 7 64-bit with supplied drivers (or the drivers downloaded from Syba) due to driver signing enforcement under 64-bit Windows 7.

Other Thoughts: Cheap, works fine to add an old-fashioned serial port to new "no-legacy-port" motherboards.

3 out of 3 people found this review helpful. Did you? Yes No

  • David S.
  • 6/10/2010 4:27:55 PM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

1 out of 5 eggsWhat happened to "Plug and Play"?

Pros: none so far

Cons: I've tried both of the units I purchased in two seperate XPsp2 computers in multiple pcie slots. My dell will not even boot with these cards installed. (bought 2) My AMD will boot if I find exactly the right place in the slot for the card. I bought these because a usb to serial adapter wouldn't work. Silly me I thought these might actually be "Plug and Play"

1 out of 3 people found this review helpful. Did you? Yes No

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Item#: N82E16815124084
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