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Item#: N82E16815124126

SYBA 2 Serial Ports PCI-e Controller Card with Low Profile Bracket Model SI-PEX15037

  • PCI Express to Serial Port Card

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Easily add 2 Serial ports to full tower computer case or 1 port to slim server chassis

Learn more about the Syba SI-PEX15037




PCI Express to Serial Port Card
External USB Ports
PCI Express
External Ports
2 x Serial Ports


Fully Compliant with PCI-e Base Specification, Revision 1.0a

PCI-e Multi Function Peripheral Controller with x1 Lane Interface

Support for D1, D2, D3hot and D3cold

Utilizes 100-Mhz Differential PCI-e Common Reference Clock

Supports PCI-e Power Management

Serial Port:
2 16c450/550/Extended 550 Compatible UARTs
Supports RS232 Modes
Bi-directional Speeds from 50bps to 16Mbps/Port
Full Serial Modem Control
Supports Hardware, Software Flow Control
5, 6, 7, 8 and 9-bit Serial Format Support
Support MODEM Modem Signals CTS, DSR, RI, DCD, the DTR, RTS, Convert RS232 Level
Even, Odd, None, Space & Mark Parity Supported
Custom BAUD Rates Supported with External Clock or by Programming Internal PLL
On Chip 256 Byte Depth FIFOs in Transmit, Receive Path of Each Serial Port
Support Remote Wakeup and Power management Features
Serial Port Transceiver Shutdown Support
Support Slow IrDA on all Serial Ports

Dimensions & Weight



Package Contents
2 Serial Ports PCI-e Controller Card
Low Profile Bracket for 1 COM Port
Full Bracket for 2 COM Ports
User Manual
Driver Mini CD
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 Syba SI-PEX15037

Do you own this product? Write a Review

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  • Chad W.
  • 11/25/2015 11:47:39 AM
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsFits the bill

Pros: Good product. Great that it comes w/ all the different faceplates for low-profile and high.

Cons: None

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  • Paul J.
  • 11/14/2015 7:00:56 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

2 out of 5 eggsNot a smooth sailing.

Pros: Inexpensive and small with spare low profile brackets.

Cons: Installation CD contains hodge-podge of drivers and large number of installation programs. It is not clear, which one to use as the instruction leaflet shows different directory structure. I found the right one on the third attempt. The chipset used (CH38X) is made by WinChipHead a Chinese company. I can't vouch for its full compatibility with 16C550, but the rudimentary loopback test passes OK. OTOH, the ports have about 13% worse latency than Prolific USB to RS-232 adapter, which is surprising to say the least.

Manufacturer Response:

Dear Customer,

We apologize for the issues you've experienced with this PCI-e controller card.

If you ever need help, please contact our support team to assist you by emailing

Our technical support team is available to help 9am-5pm M-F. Feel free to contact us during those business hours.

Thank you for purchasing one of our products, and for leaving us your valuable feedback.
- Regards, SYBA CST 20160112

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  • Howard R.
  • 3/30/2015 11:24:26 AM
  • Ownership: 1 day to 1 week
  • Verified Owner

4 out of 5 eggsDual port RS232 control on PCI-e card

Pros: Seems to work well. Supports a high (> 1 megabit per second) baud rate

Cons: Install instructions and manual could use a little improvement

Other Thoughts: The board has two RS232 ports, and once installed they worked well. However, the manual was very generic (for their dozen or so boards) and the directories/screens did not match my experience. Still, even with the file hunting, it took less than 30 minutes to install the board and drivers.

I have not done more than using Teraterm to test the port, but so far everything looks pretty good.

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  • Anonymous
  • 3/6/2015 9:49:35 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsWorks great!

Pros: This card works great for me. Not too many peripheral devices out there that use a serial devices anymore.

Cons: none.

Did you find this review helpful? Yes No

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Syba > 
Item#: N82E16815124126
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