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StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 Card - 16950 UART - Expansion Card - Windows/Linux - TAA

Internal
Quick installation guide
Mounting brackets included
Linux operating systems supported
StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 Card - 16950 UART - Expansion Card - Windows/Linux - TAA, PCIe, Serial, Full-...
Brand: StarTech.com
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At a Glance

Key highlights and verified hardware specifications

Detailed specs deep dive2 PDF manuals available
Weight
50 g
Width
63 mm
Height
15 mm
Depth
75 mm
Chipset
Asix AX99100
Internal
Internal
Lowest Price
100,99 kr
Andote Score
7.8/10
Price Tier Avg
6.5/10
Category Avg
6.5/10
Price Trend
Stable

Andote Analysis

Rated: 20 Sep 2026Evaluated at kr100.99
Hardware7.8/10
Andote Score7.8/10
Score Deciding Factors3 Key drivers
✓Competitive Price£100
Favorable price-to-performance ratio in categoryHigh Value
!Modest Ports Quantity4.0
Entry-level benchmark rating limits overall score6.0/10
✓Lightweight Weight50g
Top-tier capability in this category10.0/10
How We Calculate This Score

All parameters are evaluated as per the price. Our algorithm calculates each hardware specification's relative efficiency against peer products in the category based on its selling price, giving you an objective measure of value per pound. User ratings are not included in this calculation.

AI-powered analysis based on product specifications, price, and available data.

Price History

Current:100,99 kr
Lowest:100,99 kr
Average:100,99 kr
Price is stablePrice has remained consistent in the recent past.
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About StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 Card - 16950 UART - Expansion Card - Windows/Linux - TAA

Detailed specs deep dive
Official user manuals, spec sheets, and 2 PDF documents are available for this model in the Detailed specs deep dive
Brand: StarTech.com • Model: 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 Card - 16950 UART - Expansion Card - Windows/Linux - TAAModel: PEX4S953Hardware Score: 7.8/10Andote Score: 7.8/10Price-Tier Avg: 6.5/10Category Avg: 6.5/10

4 PORT SERIAL CARD: Serial controller card w/ 16950 UART based on ASIX AX99100A, allows 4x DB9 ports w/bi-directional RS232 speeds up to 921.6Kbps per port, available 256 byte FIFO buffer; Upgraded version of our popular Serial card PEX4S952. OPTIONAL CONFIGURABLE POWER: PCIe multiport serial card provides 12v, 5v, or none through pin 9 w/up to 2A total; Each of the 4 ports are individually configurable; DB44 to 4x DB9 breakout cable incl. STANDARD PROFILE & LOW PROFILE BRACKET: PCI Express RS232 serial adapter card has standard bracket pre-installed & 1x low profile bracket incl for versatile install; Supports Windows XP and up & Linux. VERSATILE APPLICATIONS: For standard profile desktop/servers with uses in point of sale terminals, PLCs, control/automation in factories, scientific sensors, medical equipment, scanners, oscilloscope. STARTECH.COM ADVANTAGE: IT professionals choice for over 30 years; PCI-e RS232 Serial expansion card is backed for life by StarTech.com, incl. free 24/5 North America based multi-lingual tech support. PCI Express to Serial Adapter | 921.6Kbps | Windows® and Linux® Compatible. This PCI Express RS232 serial adapter card lets you add four RS232 (DB9) serial ports to your computer through a PCI Express (PCIe) slot, as if they were native serial ports. The 4 port PCIe serial card enables you to interact with serial devices, such as card readers, printers, PIN pads, and modems, at speeds of up to 921.6Kbps.. Maximum Compatibility. With broad OS support, including for Windows and Linux, this multiport PCI E serial card is easy to integrate into mixed environments. The card comes pre-configured with a full-sized bracket, and includes an optional low-profile bracket, so installation is easy regardless of the case form factor. This expansion card is a direct replacement for PEX4S952 .. Experience Optimal Technology. This PCIe to serial adapter supports the following features:. • Industry standard 16950 UART compatible. • Supports max baud rate of up-to 921.6Kbps. • Provides 5/12V power output on Pin 9 when external power is connected. • 256-byte depth FIFO cache per transmitter and receiver. • Supports 9, 8, 7, 6, 5 data bits (one per port). • Asix AX99100A chipset. • Base PCI Express 1.1 compliant. The Choice of IT Pros Since 1985. StarTech.com conducts thorough compatibility and performance testing on all our products to ensure we are meeting or exceeding industry standards and providing high-quality products to IT Professionals. Our local StarTech.com Technical Advisors have broad product expertise and work directly with our StarTech.com Engineers to provide support for our customers both pre and post-sales.. Ports & interfaces. Host interface. PCIe. Output interface. Serial. Expansion card form factor. Full-height / Low-profile. Serial ports quantity. 4. Serial interface type. RS-232. Design. Internal. Yes. Product colour. Green. Mean time between failures (MTBF). 214358 h. Certification. CE, FCC, Microsoft WHQL. Features. Chipset. Asix AX99100. Baud rate. 921.6 Kbit/s. FIFO (First In, First Out). 256 B. Data bits. 5, 6, 7, 8, 9. Stop bits. 1, 1.5, 2. Parity bit. Even, Mark, No, Odd, Space. Flow Control type. No, RTS/CTS, XON/XOFF. Operational conditions. Operating temperature (T-T). -10 - 80 °C. Storage temperature (T-T). -20 - 100 °C. Operating relative humidity (H-H). 5 - 85%. Technical details. Compliance certificates. RoHS. System requirements. Windows operating systems supported. Windows 10, Windows 10 Education, Windows 10 Education x64, Windows 10 Enterprise, Windows 10 Enterprise x64, Windows 10 Home, Windows 10 Home x64, Windows 10 IOT Core, Windows 10 IoT Enterprise, Windows 10 Pro, Windows 10 Pro x64, Windows 10 x64, Windows 7, Windows 7 Enterprise, Windows 7 Enterprise x64, Windows 7 Home Basic, Windows 7 Home Basic x64, Windows 7 Home Premium, Windows 7 Home Premium x64, Windows 7 Professional, Windows 7 Professional x64, Windows 7 Starter, Windows 7 Starter x64, Windows 7 Ultimate, Windows 7 Ultimate x64, Windows 7 x64, Windows 8, Windows 8 Enterprise, Windows 8 Enterprise x64, Windows 8 Pro, Windows 8 Pro x64, Windows 8 x64, Windows 8.1, Windows 8.1 Enterprise, Windows 8.1 Enterprise x64, Windows 8.1 Pro, Windows 8.1 Pro x64, Windows 8.1 x64. Linux operating systems supported. Yes. Server operating systems supported. Windows Server 2003, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016. Weight & dimensions. Width. 63 mm. Depth. 75 mm. Height. 15 mm. Weight. 50 g. Packaging data. Quantity. 1. Cables included. Serial. Mounting brackets included. Yes. Quick installation guide. Yes. Package width. 152 mm. Package depth. 216 mm. Package height. 54 mm. Package weight. 371 g. Logistics data. Harmonized System (HS) code. 84733020. Products per master (outer) case. 16 pc(s). Master (outer) case width. 344 mm. Master (outer) case length. 474 mm. Master (outer) case height. 246 mm. manual pdf. leaflet

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