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Last Chance Startech.com 4 Port Rs232 Pci Express Serial Card 40% Off - Today Only [PNr8fMtd]

$25.99 $83.99 -69%

Last Chance Startech.com 4 Port Rs232 Pci Express Serial Card 40% Off - Today Only [PNr8fMtd]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

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Last Chance Startech.com 4 Port Rs232 Pci Express Serial Card 40% Off - Today Only [PNr8fMtd]

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.

  • • Native single chip design
  • • Includes a full profile and low profile/half-height bracket
  • • On chip 256-byte depth FIFO in transmit/receive path of each port
  • • Single-Lane (x1) PCI-Express with throughput up to 2.5Gbps
  • • Supports hardware and software flow control
  • • Supports data transfer rates up to 250Kbps on each port
  • • Compliant with PCI Express base specifications revision 1.0a
  • • Automated out-of-band flow control using CTS/RTS and DSR/DTR

What Our Customers Say

January 9, 2026

Absolutely no complaints!

I'm very pleased with the product as a whole thing.

- Tiffany G..

January 9, 2026

Absolutely no complaints!

This is a very nice and a very solid product.

- Summer Q..

January 9, 2026

Absolutely no complaints!

This is a very fine, exceptionally good tool.

- Megan G..

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