The Best Serial Port Cards of 2023

Two (2) 9-pin RS-232 serial ports.

PCI Express x1 interface (will also work on PCI-E x4, x8, x16 slot).

Compliant with PCI Express specification Revision 1.1.

PCI Express single-lane (x1) bus bandwidth 2.5 Gbps.

Support DOS, Windows 98 / Me / NT4.0 / 2000 / XP / Vista / Win7 / Win8 / Server 2003 & 2008 / Linux operating systems.

Add a RS-232 serial port to your standard or small form factor computer through a PCI Express expansion slot

PCI Express Serial Card

PCI-e Serial Card

PCI Express RS232

RS232 Card

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 / 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.)

Add 2 high-speed RS-232 serial ports to your low profile/small form factor computer with a PCI Express expansion slot

PCI Express Serial Card

PCI-e Serial Card

PCI Express RS232

RS232 Card

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.

2-port PCI serial card turns a PCI expansion slot into 2 RS-232 DB9 serial port for your computer to connect multiple legacy serial devices

Dual serial port card supports IRQ sharing and operates flawlessly with Windows 10, 8, 7, Vista, XP, 2000, ME, 98,etc; PCI 2.1 specification, Standard 16C550 UART signal

PCI card bracket with two RS232 serial interface uses WCH chip, data communication transfer rate up to 115.2 Kbps

Full-height bracket design allows PCI to serial card to be installed in virtually any desktop computer case (standard profile computer chassis)

An ideal RS232 serial expansion card for fax modem, GSM modem, printer, barcode reader, cellular phone, PDA, POS machine, GPS, ISDN terminal adapter, satellite receiver, digital camera, radio system, etc. (If need driver installation guide , pls contact us directly via the order page.)

Compliant with PCI Express Specification Rev 1.1

Compatible with 16C550/16C552/16C554 and 16C750 UART

Supports 256-byte FIFO buffer; Supports 5-6-7-8-bit serial format; Data transfer rate up to 115Kbps on each port

Standard and Low Profile Bracket Included

Supported OS: Windows 98SE / ME / XP / Vista / 7 / 8 / 8.1 / 10; Windows Server 2000 / 2003 / 2008 / 2016; DOS; Linux

2 PORT PCI RS232 SERIAL ADAPTER CARD: Controller card w/ 16C550 UART based on ASIX MCS9865, 2x DB9 ports w/bi-directional RS232 speeds up to 115.2Kbps/port, 256 byte FIFO buffer & 9th data bit | Upgraded version of our popular cards PCI2S550_LP & PCI2S550

TECH SPECS: Speeds up to 115.2Kbps | 16C550 UART | 256 byte FIFO buffer | 5,6,7,8 and 9 bit character | Even, Odd, No, Space or Mark Parity | Auto IRQ & IO assignment | Supports IRQ Sharing | ASIX MCS9865 Chip

VERSATILE APPLICATIONS: Dual Serial Port PCI Card for PCI desktops/servers used in point of sale terminals, PLCs, CNC Machines, control/automation in factories, scientific sensors, medical equipment, scanners, oscilloscope

STANDARD PROFILE & LOW PROFILE BRACKET: PCI multiport serial COM card installs using 1x standard bracket (pre-installed) or 2x low profile brackets (incl); Supports Windows 7 and up, Linux 2.6.x to 5.x

2-port PCI express serial card turns a PCI-E expansion slot into 2 RS-232 DB9 serial port for your computer to connect multiple legacy serial devices

Dual serial port card supports IRQ sharing and operates flawlessly with Windows 10, 8, 7, Vista, XP, 2000, ME, 98, Mac OS, Linux, etc; PCI-E 1.0 a specification, Standard 16C550 UART signal

PCI express combo card bracket with two RS232 serial interface uses WCH382 chip, high speed data communication transfer rate up to 250 Kbps

Standard-height PCIe card bracket design allows the PCI to serial card to be installed in virtually any desktop computer case (full profile computer chassis)

An ideal serial expansion PCIe card adapter for fax modem, GSM modem, printer, barcode reader, cellular phone, PDA, POS machine, GPS, ISDN terminal adapter, satellite receiver, digital camera, hard drive, radio system, etc (If need driver installation guide , pls contact us directly via the order page.)

Add 2 RS-232 serial ports to your standard or small form factor computer through a PCI Express expansion slot

RS232 Card

PCI Express Serial Card

PCI-e Serial Card

PCI Express RS232