STARTECH
PEX4S553 StarTech.com 4 Port Native PCI Express RS232 Serial Adapter Card with 16550 UART
Mfg Part Number: PEX4S553 , Item #: 1269336
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Price: $144.99
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Quantity:
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Last Updated: Feb 27, 2026
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The PEX4S553 4-Port Native PCI Express RS232 Serial Adapter Card with 16550 UART lets you add 4 RS232 (DB9) serial ports, using a single PCI Express expansion slot.
Based on a native single-chip design, this 4-port serial adapter card allows you to harness the full capability offered by PCI Express (PCIe), while reducing the load applied to the CPU by as much as 48% over conventional bridge-chip serial cards.
The RS232 Serial Adapter Card includes 4 half-height/low-profile brackets, allowing the card to be installed into almost any PC case, regardless of form factor.
Backed by a StarTech.com Lifetime warranty and free lifetime technical support.
More from the Manufacturer
Main Specification
| General Information | |
| Manufacturer | StarTech.com |
| Manufacturer Part Number | PEX4S553 |
| Manufacturer Website Address | http://www.startech.com |
| Brand Name | StarTech.com |
| Product Name | 4 Port Native PCI Express RS232 Serial Adapter Card with 16550 UART |
| Packaged Quantity | 1 |
| Product Type | Serial Adapter |
| Technical Information | |
| Host Interface | PCI Express x1 |
| Data Transfer Rate | 128kB/s |
| UART Type | 16C450 |
| UART Type | 16550 |
| Platform Supported | PC |
| Interfaces/Ports | |
| Number of Serial Ports (External) | 4 |
| Physical Characteristics | |
| Form Factor | Plug-in Card |
| Card Height | Dual-profile |
| Height | 0.7" |
| Width | 5.1" |
| Length | 4.7" |
| Weight (Approximate) | 2.60 oz |
| Miscellaneous | |
| Package Contents |
|
| Additional Information | |
| Environmentally Friendly | Yes |
| Country of Origin | China |
| Warranty | |
| Limited Warranty | Lifetime |
Connector Adapters
Connector Cables
WARNING:: The plastic used in cable products can expose you to lead and lead components,
chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
For more information go to www.P65Warnings.ca.gov
