Manufacturer | StarTech.com |
Manufacturer Part Number | PEX4S553B |
Manufacturer Website Address | www.startech.com |
Product Name | 4 Port RS232 PCI Express Serial Card w/ Breakout Cable |
Marketing Information | The PEX4S553B 4-Port PCI Express Serial Card (with breakout cable) lets you add 4 RS232 serial ports using a single PCIe expansion slot, with an included 1-to-4 cable enabling you to add 4 serial ports to a single low profile slot. The serial 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 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®, Linux, and MAC OS. This product is a replacement for our PEX4S552B card. Backed by a StarTech.com lifetime warranty and free lifetime technical support. |
Packaged Quantity | 1 Each |
Product Type | Multiport Serial Adapter |

StarTech.com 4 Port PCI Express Serial Card w/ ...show more
Mfr.Part#: PEX4S553B
GTIN: 065030842556
Availability: IN STOCK
Stock: 845
$82.85
YOU SAVE: $39.14
LIST PRICE: $121.99 each
Technical Information | |
Host Interface | PCI Express x1 |
Maximum Data Transfer Rate | 1.95 Mbit/s |
Platform Supported |
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Interfaces/Ports | |
Ports Expandability | 4 x DB-9 RS-232 - Serial, Via Cable |
Physical Characteristics | |
Form Factor | Plug-in Card |
Height | 2.7" |
Width | 0.5" |
Weight (Approximate) | 8.40 oz |
Miscellaneous | |
Package Contents |
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System Requirements | OS Compatibility:
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Country of Origin | China |
TAA Compliant | Yes |
Environmentally Friendly | Yes |
Environmental Certification | EU RoHS |
Environmental Compliance |
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Warranty | |
Limited Warranty | Lifetime |
RatingReview |
In Stock*: Product availability status as of the previous business day and is subject to change.
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The information provided about this product is for general informational purposes only. While we strive to ensure accuracy, we make no representations or warranties of any kind regarding its completeness, reliability, or suitability. Actual product packaging and materials may contain more and/or different information than shown. Always read labels, warnings, and directions before using the product. Use at your own risk. ENGLISH PRODUCT DISCLAIMER 12 DEC 2025


