10 Best Serial Port Cards
for August 2022

Recommendations are independently chosen by MOOZ’s editors. Purchases you make through our links may earn us a commission.

1
9.7
SCORE
StarTech.com 4 Port PCI Express RS232 Serial Adapter Card - Single-Lane PCI Express - Breakout Cable - RS232 Extension - PCIe Serial Card (PEX4S553B)

StarTech.com 4 Port PCI Express RS232 Serial Adapter Card

Single-Lane PCI Express, Breakout Cable, RS232 Extension, PCIe Serial Card (PEX4S553B)

by STARTECH.COM
What We like

PCI-e Serial Card

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Product Features

  • Add 4 RS232 serial ports to any PC using a single PCI Express expansion slot
  • PCI Serial Card Adapter
  • PCI Express Serial Card
  • RS232 Card

Pci express serial card Rs232 card Pci serial card adapter Add 4 rs232 serial ports to any pc using a single pci express expansion slot

2
9.6
SCORE
StarTech.com 4 Port PCI Express PCIe Serial Combo Card with Breakout Cable - 2 x RS232 2 x RS422 / RS485 - Dual Profile (PEX4S232485)

StarTech.com 4 Port PCI Express PCIe Serial Combo Card with Breakout Cable

2 x RS232 2 x RS422 / RS485, Dual Profile (PEX4S232485)

by STARTECH.COM
What We like

The included breakout cable saves expense as an all-in-one solution, and allows the addition of multiple serial ports through a single PCI Express slot

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Product Features

  • Includes both low profile/half-height and full profile brackets to ensure fitment into a broad range of system form factors
  • This single PCI Express combo card is compatible with any serial device protocol (RS232, RS422, and RS485), allowing for communication with multiple devices over mixed protocols
  • Add two RS232 and two RS422/485 serial ports to your PC through a PCI-Express expansion slot
  • Supports 2-Wire / 4-Wire RS485 modes
  • 256-byte deep FIFO per transmitter and receiver

4 port pci express pcie serial combo card Rs232 data transfer rates up to 460 kbps 4 port (2 x rs232, 2 x rs422/485) serial combo card Add two rs232 and two rs422/485 serial ports to your pc through a pci-express expansion slot Includes both low profile/half-height and full profile brackets to ensure fitment into a broad range of system form factors 256-byte deep fifo per transmitter and receiver Supports 2-wire / 4-wire rs485 modes Pci express rs485 / pcie rs485 / pci express rs422 / pcie rs422 serial combo card This single pci express combo card is compatible with any serial device protocol (rs232, rs422, and rs485), allowing for communication with multiple devices over mixed protocols Dual profile pcie serial card adapter with breakout cable

3
9.3
SCORE
StarTech.com 1 Port Low Profile Native RS232 PCI Express Serial Card with 16550 UART (PEX1S553LP)

StarTech.com 1 Port Low Profile Native RS232 PCI Express Serial Card with 16550 UART (PEX1S553LP)

by STARTECH.COM
What We like

RS232 Card

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Product Features

  • PCI-e Serial Card
  • PCI Express Serial Card
  • PCI Express RS232
  • Add a RS-232 serial port to your standard or small form factor computer through a PCI Express expansion slot

Pci-e serial card Pci express serial card Pci express rs232 Add a rs-232 serial port to your standard or small form factor computer through a pci express expansion slot

4
9.2
SCORE
StarTech.com 2-Port PCI Express Serial Card with 16C1050 UART - RS232 Low Profile Serial Card - PCI Serial Card (PEX2S1050)

StarTech.com 2-Port PCI Express Serial Card with 16C1050 UART

RS232 Low Profile Serial Card, PCI Serial Card (PEX2S1050)

by STARTECH.COM
What We like

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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Product Features

  • HIGH-PERFORMANCE COMMUNICATION: The low-profile serial card delivers high-performance serial communication, with support for data transfer rates of up to 460Kbps.
  • 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. 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. 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.

5
8.9
SCORE
StarTech.com 2 Port Low Profile Native RS232 PCI Express Serial Card with 16550 UART - PCIe RS232 - PCI-E Serial Card (PEX2S553LP)

StarTech.com 2 Port Low Profile Native RS232 PCI Express Serial Card with 16550 UART

PCIe RS232, PCI-E Serial Card (PEX2S553LP)

by STARTECH.COM
What We like

RS232 Card

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Product Features

  • PCI Express RS232
  • PCI-e Serial Card
  • 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 express serial card Pci express rs232 Pci-e serial card Add 2 high-speed rs-232 serial ports to your low profile/small form factor computer with a pci express expansion slot

6
8.7
SCORE
SIIG Legacy and Beyond Series 2 Port (Dual) Serial / RS-232 PCIe Card with 16C550 UART

SIIG Legacy and Beyond Series 2 Port (Dual) Serial

RS-232 PCIe Card with 16C550 UART

by SIIG
What We like

Chipset: ASIX/MosChip MCS9900CV-AA

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Product Features

  • Perfect solution to connect with POS system, industrial testing and control device, security system, logistic management equipment, etc.
  • Quickly adds two serial ports through an available PCI Express slot
  • Supports serial port data transfer rates up to 115.2 Kbps, compatible with 16C550 UART
  • 256-byte depth FIFO buffer supports fast data transfer especially in a multitasking environment

Supports serial port data transfer rates up to 115.2 kbps, compatible with 16c550 uart Quickly adds two serial ports through an available pci express slot Perfect solution to connect with pos system, industrial testing and control device, security system, logistic management equipment, etc. 256-byte depth fifo buffer supports fast data transfer especially in a multitasking environment

7
7.3
SCORE
Manhattan Products 152082 Manhattan Serial PCI Express Card Quickly and Easily Adds Two DB9 Ports to PCI E

Manhattan Products 152082 Manhattan Serial PCI Express Card Quickly and Easily Adds Two DB9 Ports to PCI E

by MANHATTAN - STRATEGIC
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8
7.3
SCORE
PCIE 2 Port Serial Expansion Card PCI Express to Industrial DB9 RS232 COM Port Adapter WCH382 Chip for Desktop PC Windows 10 with Low Bracket

ELIATER PCIE 2 Port Serial Expansion Card PCI Express to Industrial DB9 RS232 COM Port Adapter WCH382 Chip for Desktop PC Windows 10 with Low Bracket

by ELIATER
What We like

This card capability allow for upgrade with additional serial cards to your computer easily.

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Product Features

  • 2 x 16550 Fast Uart serial port, data transfer rate support up to 115200bps.
  • Plug and Play, Automatically selects IRQ & IO address, Supports IRQ sharing.
  • Compliant with ExpressCard/34mm Standard; Compatible to 1-Lane (x1) PCI-Express Throughput.

Compliant with expresscard/34mm standard; compatible to 1-lane (x1) pci-express throughput. Plug and play, automatically selects irq & io address, supports irq sharing. 2 x 16550 fast uart serial port, data transfer rate support up to 115200bps.

9
7.3
SCORE
SIIG Dual (2) Serial Port/RS-232 and Single (1) Parallel Port PCIe Card Compatible with 16C550 UART (JJ-E20411-S1)

SIIG Dual (2) Serial Port/RS-232 and Single (1) Parallel Port PCIe Card Compatible with 16C550 UART (JJ-E20411-S1)

by SIIG
What We like

Easily adds two serial port and one parallel port through an available PCI Express slot. 16C650 UART serial port with data transfer rate up to 250Kbps. Compliant with PCI Express 2.0 Gen 1. Compatible with IEEE 1284 -1994 parallel port standard for SPP/Byte/ECP Mode.

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Product Features

  • Works as standard RS-232 port or with 5V or 12V power output for devices that require power (such as handheld scanners, table scanners, POS displays, etc.), power output configurable via jumpers. Supports PCI bus Power Management Interface Specification Revision 1.2.
  • Single-lane (X1) PCI Express end-point controller with PHY integrated. Full serial modem control. Hardware and software flow control.
  • 5, 6, 7, 8 and 9-bit serial format. Even, odd, none, space and mark parity. On chip 256 byte FIFO buffers in transmit, receive path.
  • Dual-profile design fits full height and low-profile system chassis with the included spare low-profile brackets. Perfect solution to connect with POS systems, industrial testing and control devices, security systems, logistic management equipment, printers, scanners, etc.

5, 6, 7, 8 and 9-bit serial format. even, odd, none, space and mark parity. on chip 256 byte fifo buffers in transmit, receive path. Works as standard rs-232 port or with 5v or 12v power output for devices that require power (such as handheld scanners, table scanners, pos displays, etc.), power output configurable via jumpers. supports pci bus power management interface specification revision 1.2. Dual-profile design fits full height and low-profile system chassis with the included spare low-profile brackets. perfect solution to connect with pos systems, industrial testing and control devices, security systems, logistic management equipment, printers, scanners, etc. Single-lane (x1) pci express end-point controller with phy integrated. full serial modem control. hardware and software flow control.

10
7
SCORE
PCIe Combo Serial Parallel Expansion Card PCI Express to Printer LPT Port RS232 Com Port Adapter IEEE 1284 Controller Card WCH382 Chip for Desktop PC Windows 10 with Low Bracket

ELIATER PCIe Combo Serial Parallel Expansion Card PCI Express to Printer LPT Port RS232 Com Port Adapter IEEE 1284 Controller Card WCH382 Chip for Desktop PC Windows 10 with Low Bracket

by ELIATER
What We like

This card capability allow for upgrade with additional serial or parallel cards to your computer easily.

more infoarrow_drop_down

Product Features

  • Plug and Play, Automatically selects IRQ & IO address, Supports IRQ sharing.
  • Multi-mode IEEE 1284 compliant controller (SPP, PS2, EPP, ECP), Faster data rates up to 1.5Mbps for parallel port.
  • Compliant with ExpressCard/34mm Standard; Compatible to 1-Lane (x1) PCI-Express Throughput.

Compliant with expresscard/34mm standard; compatible to 1-lane (x1) pci-express throughput. Multi-mode ieee 1284 compliant controller (spp, ps2, epp, ecp), faster data rates up to 1.5mbps for parallel port. Plug and play, automatically selects irq & io address, supports irq sharing.

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