10 Best Serial Port Cards
#1 Best Pick
StarTech.com PEX2S953LP 2 Port RS232 PCIe Serial Adapter Card with 16950 UART
Brand: StarTech
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- Compatible with industry standard 16950 UART
- Supports max baud rate of up-to 921.4Kbps
- Provides 5/12V power output on Pin 9 when external power is connected
- 256-byte depth FIFO per transmitter and receiver
- Supports 9, 8, 7, 6, 5 data bits
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#2 Best Value
34mm Express Card to Serial Port DB9 COM RS232 RS-232 Cable Expansion Card for Laptop
Brand: MEO
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- Compatible with standard 34mm Express Card slot
- Compliant with standard RS-232 serial port
- System Requirements: Windows 98SE, ME, 2000, XP, Vista, Windows 7
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#3 Budget Pick
Syba Dual Port Serial DB9 RS232 PCIe X1 Card Components SD-PEX15022
Brand: Syba
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- Fully compliant with PCI-Express base Specification Revision 1.0A
- Chipset: MCS9922
- Included Low profile bracket
- Compatible with industrial standard 16C550 UART
- On chip 256-byte depth FIFO in transmit.Form Factor: Low-profile
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#4 Top Choice
ELIATER PCIE 2 Port Serial Expansion Card PCI Express to Industrial DB9 RS232 COM Port Adapter WCH382 Chip for Desktop PC with Low Bracket
Brand: ELIATER
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- This card capability allow for upgrade with additional serial cards to your computer easily. Note: Open the "CH38XDRV"file in the CD to install.
- 2 x 16C550 Fast Uart serial ports, supporting data transfer rates up to 230400Bps.
- Plug and Play, Automatically selects IRQ & IO address, Supports IRQ sharing.
- Compliant with ExpressCard/34mm Standard; Compatible to 1-Lane (x1) PCI-Express Throughput.
- Operating System: Windows 32bit 2000/XP/2003 Server/Vista and 64bit XP/2003 Server/Vista/WIN7/WIN8/WIN10/WIN11/Linux. (If there was any problem with PCIE 2 port serial expansion card, pls feel free to contact us, we will provide a solution within 24hrs.)
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#5 Popular Choice
PCI-E to USB3.0 Expansion Serial Card Adapter with Front 19PIN Interface, 2 Ports Desktops Card Support for XP 32/64 for 7 8 10, PCIE Card Super Speed Up to 5Gbps
Brand: Dpofirs
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- Wide Operating System Compatibility: The expansion card is compatible with a range of operating systems, including XP 32/64, 7 32/64, 8, 8.1, and 10.
- Performance and Functionality: The USB 3.0 expansion card is known for its performance and functionality.
- Easy Installation Process: The USB 3.0 expansion card is designed for easy installation, making it convenient for users to upgrade their system without hassle.
- High Speed Data Transfer Rates: The USB 3.0 expansion card supports transfer rates of up to 5 Gbps, enabling fast and efficient data transfer.
- Bus Mode and Slot Compatibility: The expansion card operates in PCI-E x1 bus mode, providing compatibility with PCI-E x1, x4, x8, and x16 slots.
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#6 Top Pick
PCIe Serial Card, PCI Express RS232 Serial Adapter Card, 2 Port PCIe Serial Expansion Card for for Linux, AX99100 Chipset
Brand: Jectse
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- Full Duplex Channel: 2.5Gbps PCIE bus supporting full duplex channel. Compliant with Single Lane (x1) PCIExpress Specification Revision 1.0a.
- Interface Slots: PCI Express x1 interface (also for PCIE x1, x4, x8, x16 slots). Two 9 pin RS 232 serial ports.
- Support System: PCIE serial card supports operating systems for for for for , for XP, for 2000, for Linux, for DOS, for Server 2003.
- AX99100 Chip: Allows to easily connect more serial devices to your computer. Stable and chipset AX99100 with enhancement chip. Supports remote wake up and power management functions.
- Application Areas: Serially connected equipment, serial net/monitoring equipment, data acquisition system POS terminals and industrial PCs, I/O expansion of embedded systems.
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#7 Top Pick
![StarTech 2-Port PCI Express Serial Card with 16C1050 UART - RS232 [PEX2S1050]](https://m.media-amazon.com/images/I/41jaoVYmS9L._SL500_.jpg)
StarTech 2-Port PCI Express Serial Card with 16C1050 UART - RS232 [PEX2S1050]
Brand: StarTech
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- MEETS INDUSTRY STANDARDS: The 2-port PCI express serial card is compliant with PCI Express 1.0a specification, and it's compatible with 1x, 2x, 4x, 8x and 16x PCI Express slots.
- MAXIMUM COMPATIBILITY: The dual port DB9 to PCIe adapter is ideal for system upgrades in a wide range of applications including manufacturing equipment, POS equipment, and security devices.
- HIGH-PERFORMANCE COMMUNICATION: The low-profile serial card delivers high-performance serial communication, with support for data transfer rates of up to 460Kbps.
- SIMPLE INSTALLATION: The PCI dual serial adapter features IRQ sharing and supports plug-and-play connection. It has a standard-profile bracket installed, and an optional low-profile bracket.
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#8 Top Pick
Eacam PCIe RS232 Card, Dual Port PCI Express RS232 DB9 Serial Port Card, PCIe Serial Expansion Card for, Linux, Support POS Systems, Security Systems, Scanners
Brand: Eacam
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- [Expand Your Connectivity] Add two rs232 bd9 serial ports to desktop computers or industrial equipment through the pcie slot, supporting x1, x4, x8, x16 slots.
- [Universal Compatibility] Full-size bracket suitable for standard pcs, for various applications in industries, logistics, and retail sectors.
- [Driver Compatibility] Requires driver installation for xp, vista, 7, 8.x, 10, 11 and reference to compiled source code for linux kernel 2.6.x, 3.x, 4.x, 5.x systems.
- [Versatile Applications] Seamlessly connect pos systems, industrial devices, security systems, scanners, printers, and more with this pcie serial expansion card.
- [high speed Data Transfer] Asix ax99100 chip offers 256 byte depth fifo transfers, ensuring efficient data processing for and arm hardware platforms.
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#9 Top Pick
ECSiNG Port Card PCI Express Serial Card PCI Express Serial Extension Adapter PCI-E to RS232 Serial Expansion Card Compatible with Windows XP/Vista/7/8
Brand: ECSiNG
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- Dual RS232 Ports: Transform a single PCI Express slot into two RS232 (DB9) serial ports, doubling your connectivity options.
- Compliance & Support: Conforms to PCI-Express Specification Revision 1.1. Supports DOS, Compatible with Windows 8/7/Vista/XP/2000/Server 2003-2008 32/64-bit, Compatible with Linux, and other operating systems.
- Enhanced Data Transfer: Built-in 256-byte FIFO and hardware/software flow control ensure reliable data transfer at speeds of up to 250Kbps per port.
- Simple Installation: Easy setup - just insert the PCI Express control card into the free slot on your computer and install the provided drivers.
- Broad Utility: Perfectly suited for use in ticket printing, barcode scanning, card reading, cash register systems, and various other applications.
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#10 Top Pick
StarTech.com PEX2S953LP 2 Port RS232 PCIe Serial Adapter Card with 16950 UART
Brand: StarTech
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- Compatible with industry standard 16950 UART
- Supports max baud rate of up-to 921.4Kbps
- Provides 5/12V power output on Pin 9 when external power is connected
- 256-byte depth FIFO per transmitter and receiver
- Supports 9, 8, 7, 6, 5 data bits
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