What kind of data transfer speed can I expect from this card?

The card provides high-speed data transfer rates of up to 921.6 Kbps.

Is this card compatible with all kinds of computer cases?

The card includes both a low profile bracket pre-installed and a full profile bracket, making it compatible with different computer case sizes.

How many serial ports does this adapter card provide?

This adapter card provides four serial ports.

Can this card be used with my Windows 10 system?

Yes, this card is compatible with Windows 10.

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StarTech.com PEX4S953LP 4-Port PCI Express RS232 Serial Adapter Card - 16950 UART - 256-byte FIFO Cache - ASIX AX99100 - Low Profile Bracket - Replacement for PEX4S952LP (PEX4S953LP)

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This PCI Express RS232 serial adapter card lets you add four RS232 (DB9) serial ports to your computer through a PCI Express (PCIe) slot
The replacement for the PEX4S952LP serial card enables you to interact with serial devices such as printers and modems
The 4-port serial PCIe card provides a max baud rate of up to 921.6Kbps and 256-byte FIFO cache with the Asix AX99100 chipset
The low profile PCI E serial card is easy to integrate into many environments with support for Windows and Linux

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Model
Brand	StarTech.com
Model	Serial Adapter Card

Details
Type	PCI Express to Serial Port Card
External Ports	4 - DB-9 (9 pin, D-Sub) Male
Internal Ports	1 - LP4 (4 pin; Large Drive Power) Male Input
Operating Systems Supported	Windows 7, 8, 8.1, 10 Windows Server 2003, 2008 R2, 2012, 2012 R2, 2016 Linux 2.4.x to 2.6.x LTS Versions only
Specifications	HARDWARE Bus Type: PCI Express Card Type: Standard Profile (LP bracket incl.) Chipset ID: Asix AX99100 Interface: Serial Port Style: Integrated on Card Ports: 4 PERFORMANCE Data Bits: 5, 6, 7, 8, 9 FIFO: 256 Bytes Flow Control: None, Xon/Xoff, RTS/CTS Max Baud Rate: 921.6 Kbps Parity: None, Odd, Even, Space, Mark Serial Protocol: RS-232 Stop Bits: 1, 1.5, 2

Features
Features	PCI Express 1.1 compliant replacement to the PEX4S952LP Serial Card, ensuring wide compatibility Add RS232 DB9 capabilities without purchasing a new server or computer Low profile bracket comes pre-installed, a full profile is also included for case compatibility Supports 256-byte depth FIFO cache per transmitter and receiver High-speed data transfer rates of up to 921.6Kbps with the ASIX AX99100 Chipset

Dimensions & Weight
Dimensions	3" x 2.5" x 0.7"
Weight	0.58 lb.

Packaging
Package Contents	1 - 4-Port Low Profile Serial Card 1 - 4-Port DB9 Break-out Cable 1 - Full Profile Bracket 1 - Quick-Start Guide

Additional Information
First Listed on Newegg	April 27, 2020

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Limited Warranty period (parts): 1 year
Limited Warranty period (labor): 1 year
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Return Policies

We want to ensure your holiday shopping this year is hassle-free. That’s why we’re automatically extending our return policies on almost every product! For purchases placed between November 1st, 2026 and December 31, 2026 you will have until January 31, 2027 to return your product.

Return for refund until: January 31, 2027
Return for replacement until: January 31, 2027
This item is covered by Newegg.com's Extended Holiday Return Policy.
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StarTech.com PEX4S953LP 4-Port PCI Express RS232 Serial Adapter Card - 16950 UART - 256-byte FIFO Cache - ASIX AX99100 - Low Profile Bracket - Replacement for PEX4S952LP (PEX4S953LP)

Learn more about the STARTECH Serial Adapter Card

Customer Reviews of the STARTECH Serial Adapter Card

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info

Item#: N82E16815158467

Best Sellers

StarTech.com PEX4S953LP 4-Port PCI Express RS232 Serial Adapter Card - 16950 UART - 256-byte FIFO Cache - ASIX AX99100 - Low Profile Bracket - Replacement for PEX4S952LP (PEX4S953LP)

Learn more about the STARTECH Serial Adapter Card

Customer Reviews of the STARTECH Serial Adapter Card

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info