STARTECH Multiport Serial Adapter

STARTECH .com Multiport Serial Adapter
Retail price: $228.79
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The PEX4S553B 4-Port PCI Express Serial Card (with breakout cable) lets you add 4 RS232 serial ports using a single PCIe expansion slot. The PCIe Serial Card includes a 1-to-4 break out cable, which enables you to add 4 serial ports to a single low profile slot.

The serial adapter card features a native single-chip design that provides optimum reliability and speed, reducing the CPU load by up to 48% over conventional bridge-chip serial cards - a cost-effective solution for connecting legacy serial devices to PCIe-enabled computers.

The multi-port serial adapter includes both full profile/height and low profile/half-height brackets for compatibility with standard and small form factor computers, and is compatible with a broad range of operating systems, including Windows 7/Server 2008 R2, 2003/Vista/XP (32 and 64 bit), Linux Kernel 2.6.11 and up, as well as MAC OS 10.5 and above.


General Information

Manufacturer Website Address:
Brand Name:
Product Name:
4 Port RS232 PCI Express Serial Card w/ Breakout Cable
Product Type:
Multiport Serial Adapter

Technical Information

Host Interface:
  • PCI Express x1
Data Transfer Rate:
  • 250 kbit/s
Platform Supported:
  • PC
  • Mac


Ports Expandability:
4 x 9-pin DB-9 Male RS-232 - Serial, Via Cable

Physical Characteristics

Form Factor:
Plug-in Card


Package Contents:
  • 4 Port RS232 PCI Express Serial Card w/ Breakout Cable
  • 1 x DB9 Breakout Cable
  • 1 x Full Profile Bracket
  • 1 x Driver CD
  • 1 x Instruction Manual
System Requirements:
Operating System(s):
  • Windows 8 (32/64bit)
  • Windows 7 (32/64)
  • Windows Vista (32/64)
  • Windows XP (32/64)
  • Windows XP Embedded
  • Windows POSReady 2009
  • Windows Embedded System 2009
  • Windows CE 5.0
  • Windows CE 6.0
  • Windows 2000
  • Windows 98SE
  • Windows 95
  • Windows Server 2008 R2
  • Windows Server 2003(32/64)
  • DOS
  • Mac OS 10.4 and up (Tested up to 10.8)
  • Linux
Green Compliant:
Green Compliance Certificate/Authority:
  • RoHS


Standard Warranty:
2 Year