Best Serial Port Cards (Oct. 2026) - Rated by CherryPicks' Experts

At a Glance: Our Top Picks

Top 1

StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial...

9.8
CPR Score
Top 2

StarTech.com 2 Port Native PCI Express RS232 Serial Adapter Card with 16950 U...

9.7
CPR Score
Top 3

StarTech.com PCIe Card with Serial and Parallel Port - PCI Express Combo Adap...

9.7
CPR Score
Tips


Based on our evaluations of 134 Serial Port Cards and the analysis of over 724 consumer satisfaction reviews, We have rank top 30 Best Serial Port Cards reviews of different brands, such asStarTech.com, Syba, ELIATER, Dilwe, IO CREST, zdyCGTime, BestParts, PUSOKEI And SIIG.

* CherryPicks.Reviews is reader-supported, Our editor review, and recommend the best products based on extensive data analysis, if you click on the product links, we may earn a commission through qualifying products purchased.

The Best Serial Port Cards Rated by CherryPicks

Market Overview
Serial Port Cards Reviewed
  • Reviews Analyzed: 724 Items
  • CPR Avg. Rating: 8.5 / 10
30 Products Evaluated
  • Highest Price: $389.99
  • Lowest Price: $8.99
  • Avg. Price: $45.11
Price Disclaimer

Top 30 Serial Port Cards on Amazon (Verified You can Buy)

Top 1

StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16950 UART - Low Profile Expansion Card - Windows & Linux , TAA (PEX4S953LP)

StarTech.com
PEX4S953LP
2.48 x 2.95 x 0.71 inches
0.58 pounds
  • Published: English
  • Manual: French

Ratings for StarTech.com (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com - ❌ ❌ ❌

Features

4 PORT SERIAL CARD: Serial controller card w/16950 UART based on ASIX AX99100, 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 card PEX4S952LP
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
Show More
Top 2

StarTech.com 2 Port Native PCI Express RS232 Serial Adapter Card with 16950 UART (PEX2S952),Green

StarTech.com
PEX2S952
4.99 x 3.79 x 0.99 inches
0.32 Pounds
  • Original Language, Unknown: English

Ratings for StarTech.com (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com - ❌ ❌ ❌
Trade Box Store - ❌ ❌ ❌

Features

Add 2 RS-232 serial ports to your full height or low profile computer through a PCI Express slot
PCI Express Serial Card
Show More
Top 3

StarTech.com PCIe Card with Serial and Parallel Port - PCI Express Combo Adapter Card with 1x DB25 Parallel Port & 1x RS232 Serial Port - Expansion/Controller Card - PCIe Printer Card, TAA

StarTech.com
PEX1S1P950
3.1 x 3.7 x 0.9 inches
0.13 pounds
  • Manual: French

Ratings for StarTech.com (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com - ❌ ❌ ❌

Features

PCIe CARD WITH SERIAL & PARALLEL PORT: Using a x1 PCIe 2.0 slot, add a DB25 parallel & a DB9 RS232 port to your computer; Card installs in full/standard profile PCIe slot; Latest version of our popular PEX1S1P952
TECH SPECS: Parallel Speeds up to 2.5Mbps | Supports SPP/Byte/ECP modes | Compatible with IEEE 1284 | Asix AX99100 chip | RS232 speeds up to 921.6Kbps | 16C950 UART | 256 byte FIFO buffer
Show More
Top 4

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 (PEX4S953)

StarTech.com
PEX4S953
2.95 x 2.48 x 0.59 inches
0.1102 pounds
  • Published: English
  • Manual: French

Ratings for StarTech.com (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com - ❌ ❌ ❌

Features

4 PORT SERIAL CARD: Serial controller card w/ 16950 UART based on ASIX AX99100, 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
Show More
Top 5

5V ISA RS232 Serial and Parallel Port Card COM1 COM2 Serial LPT1 Parallel Fit for Celeron Machine with ISA Slot

DBEIXIWEI
universal

Ratings for DBEIXIWEI (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Dangbei-EU - ❌ ❌ ❌

Features

Retro computer ISA interface card, 8086 80286 80386 80486 586 for pentium or for Celeron machine with ISA slot can be used.
With external COM1 serial/LPT1 parallel port and internal COM2 Serial port, it can connect your computer to external serial devices.
Show More
Top 6

Syba Single Port RS-232 DB9 Serial PCI-e 2.0 x1 Expansion Card MCS9922 SD-PEX15021

Syba
SD-PEX15021
7.0 x 1.5 x 6.0 Inches
0.25 pounds

Ratings for Syba (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Gott Electronics 9,385 ✅ ✅ ✅
Huzzatek - ✅ ✅ ✅
Amazon.com - ✅ ✅ ✅
SQLogic - ✅ ✅ ✅
KART IT 2,133 ❌ ❌ ❌

Features

MCS9922 Chipset
Compatible with Industrial Standard 16C550 UART. On Chip 256-byte Depth FIFO in Transmit.
Show More
Top 7

SIIG Single Serial PCIe Card Adapter, 16650 UART, Baud Rates up to 250Kbps, PCIe 2.0 x1 to 1x RS-232 Male 9-pin DB9, RS-232 5V or 12V Power, ASIX AX99100 Chipset, Dual-Profile Brackets (JJ-E20611-S1)

SIIG
JJ-E20611-S1
4.72 x 2.87 x 0.71 inches

Ratings for SIIG (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
e-TekDepot - ❌ ❌ ❌
Technology Galaxy 589 ❌ ❌ ❌
Neutron USA - ❌ ❌ ❌

Features

PCIe CARD: Adds 1 9-pin RS-232 serial port to PCIe enabled desktop computers, supports data transfer rate up to 250Kbps, Compliant with PCI Express 2.0 Gen 1
SEAMLESS CONTROL: Single-lane (x1) PCI Express End-point Controller with PHY integrated; Full serial modem control with hardware and software flow control; Supports 5, 6, 7, 8 and 9-bit serial formats, and Even, Odd, None, Space and Mark parity; On chip 256-byte FIFO buffers in transmit and receive path for each serial port
Show More
Top 8

StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16950 UART - Low Profile Expansion Card - Windows & Linux , TAA (PEX2S953LP)

StarTech.com
PEX2S953LP
4.4 x 0.9 x 3.1 inches
0.2094 Pounds
  • Manual: French
  • Original Language: Italian

Ratings for StarTech.com (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com - ❌ ❌ ❌

Features

2 PORT SERIAL CARD: Serial controller card w/16950 UART based on ASIX AX99100, allows 2x DB9 ports w/bi-directional RS232 speeds up to 921.6Kbps per port, available 256 byte FIFO buffer & 9th data bit; Upgraded version of our popular card PEX2S952LP
OPTIONAL CONFIGURABLE POWER: PCI Express RS232 serial adapter card provides choice of 12v, 5v, or none through pin 9 w/up to 2A total; Each of the 2 ports are individually configurable
Show More

XRIKUI Dual Port PCI Express RS-232 DB9 Serial Port Card for Windows XP, Vista,7, 8.x, 10, 11 32/64bit and Linux PCs, PCIE 2X DB9 Card

XRIKUI
XRIKUI-DP-PCIE-RS232-3264-LINUX
0.17 Pounds

Ratings for XRIKUI (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
XRiKuiDirect - ❌ ❌ ❌

Features

Dual Serial Ports: Provides two independent RS232 serial ports, enabling connections with multiple serial DB9 port (RS232 communication) devices, significantly expanding your system's connectivity.
Wide Compatibility: Requires driver installation for Windows XP, Vista, 7, 8.x, 10, 11 (32/64-bit) systems. For Linux kernels 2.6.x, 3.x, 4.x, 5.x, source code on the driver CD can be compiled.
Show More
Top 10

BZIZU 2-Port PCIe RS-232 DB9 Serial Port Card - Windows XP/7/8/10/11 & Linux Compatible (32/64bit) for Fast Data Transfer (PCIe1X Dual Serial Card)

BZIZU
PCIe1X Dual Serial Card
2.57 x 0.63 x 2.36 inches

Ratings for BZIZU (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
BZIZU - ❌ ❌ ❌

Features

Expansion Interface: Easily add 2 RS232 DB9 serial ports to desktop PCs or industrial devices via the motherboard's PCI Express slot, meeting a variety of device connection needs
Wide Compatibility: Seamlessly connect to DB9 serial devices such as POS systems, industrial testing and control equipment, security systems, logistics management devices, scanners, and printers, suitable for various application scenarios
Show More

LinksTek 2-Port PCI Express RS-232 DB9 Serial Port Card for Windows XP, Vista,7, 8.x, 10, 11 32/64bit and Linux PCs, PCIE RS232 Card, PCIE Serial DB9 Port Card (PCIE-SE2)

LinksTek
PCIE-SE2
4.72 x 2.68 x 0.7 Inches
0.1764 Pounds

Ratings for LinksTek (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
LinksTek LLC - ❌ ❌ ❌
Amazon Resale - ❌ ❌ ❌

Features

1. PCIE-SE2 allow users add 2X RS232 BD9 serial Ports on desktop PCs or industrial devices by motherboard PCI Express slot.
2. Seamless connect to serial DB9 ports device such as POS system, industrial testing and control device, security system, logistic management equipment, scanners and printers.
Show More
Top 12

BZIZU 2-Port PCIe RS-232 DB9 Serial Port Card - Windows XP/7/8/10/11 & Linux Compatible (32/64bit) for Fast Data Transfer (PCIe1X to Serial to Parallel Port)

BZIZU
PCIe1X to serial to parallel port
2.57 x 0.63 x 2.36 Inches
0.2206 pounds

Ratings for BZIZU (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
BZIZU - ❌ ❌ ❌

Features

Expansion Interface: Easily add 2 RS232 DB9 serial ports to desktop PCs or industrial devices via the motherboard's PCI Express slot, meeting a variety of device connection needs
Wide Compatibility: Seamlessly connect to DB9 serial devices such as POS systems, industrial testing and control equipment, security systems, logistics management devices, scanners, and printers, suitable for various application scenarios
Show More
Top 13

StarTech.com 1-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16950 UART - Low Profile Expansion Card - Windows & Linux (PEX1S953LP)

StarTech.com
PEX1S953LP
3.86 x 2.64 x 5.91 inches
0.1 Pounds
  • Manual: French

Ratings for StarTech.com (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com - ✅ ✅ ✅
The Wozy Group - ✅ ✅ ✅

Features

1 PORT SERIAL CARD: Serial controller card w/ 16950 UART based on ASIX AX99100, allows 1x DB9 port w/bi-directional RS232 speeds up to 921.6Kbps per port, available 256 byte FIFO buffer & 9th data bit; Upgraded version of our popular card PEX1S952LP
OPTIONAL CONFIGURABLE POWER: PCI Express RS232 serial adapter card provides choice of 12v, 5v, or none through pin 9 w/up to 2A total
Show More
Top 14

NOYITO RS422 to TTL UART MCU Serial Port Signal Mutual Conversion Module with Over-Voltage Over-Current Protection (3.3V)

NOYITO
NO-RS422TTL-3.3V
1.9961 x 1.0591 x 0.3937 inches
0.0353 pounds

Ratings for NOYITO (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
NOYITO TECHNOLOGIES - ❌ ❌ ❌

Features

The module is suitable for 3.3V TTL and RS422 signal mutual conversion, RS422 level is full-duplex level signal, the use of this module can be achieved SCM serial port and RS422 signal conversion.
With over-voltage and over-current protection circuit real-time protection RS422 level signal to protect the MAX490 chip's normal work.
Show More
Top 15

IO CREST 2 Port RS-232 DB9 Serial M.2 B+M Key Controller Card SI-ADA15069

IO CREST
SI-ADA15069
3.1 x 0.75 x 0.1 inches
0.2 pounds

Ratings for IO CREST (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
VirVentures 194 ❌ ❌ ❌

Features

Data read/write 32-bit operation Global interrupt status register for both UARTs 16 multi-purpose inputs/outputs (MPIOs)
Two independent UART channels controlled with bits per second data transfer rates from 300 baud to 921600baud 16550 Compatible register set 256-Byte TX and RX fifos
Show More

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

StarTech.com
PEX2S1050
3.09 x 3.6 x 0.6 inches
0.13 Pounds
  • Manual: French
  • Original Language: Dutch
  • Unknown: English

Ratings for StarTech.com (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com - ✅ ✅ ✅
Tech for Less 902 ❌ ❌ ❌

Features

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.
Show More
Top 17

StarTech.com 1-Port PCI Express Serial Card, PCIe to RS232 (DB9) Serial Interface Card, PC Serial Card, 16C1050 UART, Standard/Low Profile Brackets, COM Retention, Windows/Linux, TAA

StarTech.com
11050-PC-SERIAL-CARD
2.6 x 2.6 x 0.7 inches
0.09 Pounds

Ratings for StarTech.com (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com - ❌ ❌ ❌

Features

PCIE TO SERIAL: Connect a serial RS232 (DB9) device to a computer with this PC serial card. Features support for high performance 16C1050 UART. Monitor activity with the built-in LED status lights on the PCI express DB9 card
DEVICE COMPATIBILITY: Use this serial interface card to connect with barcode readers/scanners, receipt printers, scales, PLCs, medical devices, etc. The UART PCIe card supplies 5V or 12V power over pin 9. Low-profile bracket is included
Show More
Top 18

PCIE 2 Port Serial Expansion Card PCI Express to Industrial DB9 Serial / RS232 COM Port Adapter 16C550 UART WCH382 Chip for Desktop PC Windows 10 with Low Bracket

ELIATER
8541586680
0.0397 pounds

Ratings for ELIATER (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
ELIATER-US - ✅ ✅ ✅

Features

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.
Show More
Top 19

SIIG Single Serial Port / RS-232 and Single Parallel Port PCIe Card Compatible with 16C550 UART (JJ-E20311-S1)

SIIG
JJ-E20311-S1
2.87 x 4.72 x 0.71 inches
0.3 Pounds

Ratings for SIIG (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
e-TekDepot - ✅ ✅ ✅
ComegaCity 8,683 ✅ ✅ ✅

Features

✅ Easily adds one 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
✅ Single-lane (X1) PCI Express end-point controller with PHY integrated. Full serial modem control. Hardware and software flow control
Show More
Top 20

StarTech.com 2-Port Serial PCIe Card, Dual-Port PCI Express to RS232/RS422/RS485 DB9 Serial Card, Standard/Low-Profile Brackets, 16C1050 UART, ESD Protection, Windows/Linux, TAA

StarTech.com
2S232422485-PC-CARD
4.1 x 4.0 x 0.6 inches
0.13 pounds
  • Original Language: Italian

Ratings for StarTech.com (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com - ❌ ❌ ❌

Features

2-PORT PCIE SERIAL CARD: On-board DIP switches allow each DB9 serial port to operate in its own independent mode, enabling the connection of RS-232, RS-422, and RS-485 devices; LED indicators to monitor data transmit/receive status
CONFIGURABLE POWER: Dual-Port PCI Express Serial Adapter Card features configurable power of 12V (1.5A per port), 5V (1.5A per port), or no power (RI) over pin 9 via auxiliary SATA power; Per-Port power modes are individually configurable via jumpers
Show More
Top 21

VANTEC 2-Port Serial RS-232 PCIE Host Card

Vantec
UGT-PCE20SR
8.0 x 5.75 x 1.5 inches
0.3 pounds

Ratings for Vantec (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com - ❌ ❌ ❌

Features

VANTEC 2-PORT SERIAL RS-232 PCIE HOST CARD
Top 22

zdyCGTime 1Port DB9 RS232Serial Port Bracket to 10 pin HeaderRibbon Cable Connector Adapter, DB9 Serial Male to 10P Motherboard Header Panel Mount Cable Serial Port Bracket (12in 4Pcs) (1 Port)

zdyCGTime
PLATE9M2P16

Ratings for zdyCGTime (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
CGTime - ❌ ❌ ❌

Features

Quantity:(4packs) DB9 (Male) Serial Ports to 10 pin (2x5) IDC (Female)Connector
DB-9 (M) to 10 pin IDC (F) 1x DB9 (Male) Serial Ports gray
Show More
Top 23

StarTech.com 2-Port PCI Express Serial Interface Card, Dual Port PCIe to RS232 (DB9) Serial Card, 16C1050 UART, Low/Full Profile Brackets, COM Retention, for Windows/Linux, TAA (21050-PC-SERIAL-LP)

StarTech.com
21050-PC-SERIAL-LP
2.6 x 2.6 x 0.7 inches
0.3307 pounds

Ratings for StarTech.com (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com - ❌ ❌ ❌

Features

PCIE TO SERIAL: Connect serial RS232 (DB9) devices to a computer with this low profile PC serial card; Features support for high performance 16C1050 UART on both DB9 male ports; Monitor activity with the built-in LED status lights on the PCI express DB9 card
DEVICE COMPATIBILITY: Use this serial interface card to connect barcode readers/scanners, receipt printers, scales, PLCs, medical devices, etc; The UART PCIe card supplies 5V or 12V power over pin 9; Full-profile bracket included
Show More
Top 24

PCI E 4 Port RS232 Serial Port Card PCI Express Adapter Card 4 Independent 9 pin Standard Serial Ports Expansion Card for POS and ATM Applications

PUSOKEI
Tangxinu0md2fgvw
4.7244 x 3.7402 x 0.7874 inches

Ratings for PUSOKEI (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Tangxi - ❌ ❌ ❌

Features

PCI-E 4-port RS232 serial port card.
Expand 4 independent 9-pin standard serial ports, like the built-in serial port data interface.
Show More
Top 25

StarTech.com PCI Express Serial Card - 16 DB9 RS232 Ports - Low + Full Profile - Multiport Serial Adapter - PCIe Serial Card (PEX16S550LP)

StarTech.com
PEX16S550LP
6.6 x 2.68 x 0.87 inches
0.15 Pounds
  • Manual: French

Ratings for StarTech.com (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com - ✅ ✅ ✅

Features

Add 16 RS232 serial ports (DB9) to your low or full-profile computer through a PCI Express slot
This 16-Port PCI Express Serial Card provides high-speed PCIe serial card with 16 DB9 RS232 ports from a single PCIe slot
Show More
Top 26

Dual Port Serial Industrial DB9 COM RS232 PCIe X1 Card for Desktop PC with Low Bracket Moschip MCS9922 SD-PEX15022

Syba
SD-PEX15022
5.6 x 4.8 x 1.2 inches
0.2205 Pounds
  • Unknown: English

Ratings for Syba (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Bestofbulk USA - ❌ ❌ ❌

Features

Fully compliant with PCI-Express base Specification Revision 1.0A
Chipset: MCS9922
Show More
Top 27

Onythral PCI Serial RS232 Card 2 Port PCI to Serial Adapter, 32 Bit Bus,

Onythral
Onythral9qneik238s

Ratings for Onythral (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Qimeir - ❌ ❌ ❌

Features

【Dual Port Expansion】Add 2 RS232 serial connections to a desktop with this PCI Serial card. A practical PCI to Serial solution for linking multiple devices through one host system.
【High Speed Transfer】This PCI RS232 adapter supports data communication speeds up to 1M bps, helping maintain stable and responsive transfer between connected serial devices.
Show More
Top 28

SIIG Dual Serial PCIe Card Adapter, 16650 UART, Baud Rates up to 250Kbps, PCIe 2.0 x1 to 2X RS-232 Male 9-pin DB9, RS-232 5V or 12V Power, ASIX AX99100 Chipset, Dual-Profile Brackets (JJ-E20711-S1)

SIIG
DHJJE20711S1
4.72 x 0.71 x 2.87 inches
0.1 Pounds

Ratings for SIIG (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
VPCI 1,616 ✅ ✅ ✅
Triplenet Pricing INC 468 ✅ ✅ ✅
Hot Deals 4 Less® 2,459 ✅ ✅ ✅
e-TekDepot - ❌ ❌ ❌

Features

✅ Adds two 9-pin RS-232 serial port to PCIe enabled desktop computers, each port supports data transfer rate up to 250Kbps, Compliant with PCI Express 2.0 Gen 1
✅ Adds two 9-pin RS-232 serial port to PCIe enabled desktop computers, each port supports data transfer rate up to 250Kbps, Compliant with PCI Express 2.0 Gen 1
Show More
Top 29

4 Port PCI Express RS232 Serial Adapter Card, PCIe RS232 Serial Host Controller Card, PCIe to 4 Serial DB9 Card, PCI E Serial Card Stable Performance

Dilwe
Dilwea30f7t28v4862
0.2183 pounds

Ratings for Dilwe (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Wcming-US - ❌ ❌ ❌

Features

4 RS232 SERIAL PORTS: Features 4 x 9pin RS232 serial ports allowing easy connection of more serial devices to your computer.
PCI EXPRESS X1 INTERFACE: PCI Express x1 interface (also suitable for PCI-E x1, x4, x8, x16 slots) for excellent performance and long life.
Show More
Top 30

BestParts Internal Serial Port Flex IO Board Card Replacement for HP 400 G4 G5 SFF MT DM MINI 600 800 405 705 G4 DM 906312-001 914907-001

BestParts
BestParts-SW-115-F4
1.55 x 1.63 x 0.68 inches
0.0551 pounds

Ratings for BestParts (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
BestPartsCom - ❌ ❌ ❌
Amazon Resale - ❌ ❌ ❌

Features

Add an extra flexible Serial Port IO to your DM and tower (400 series only)
Interchangeable with other modules
Show More

Top 10 Serial Port Cards - Verified to Buy (October 2026)

Top 10 Serial Port Cards Brands on Amazon

Here is the list of top-rated brands that were evaluated by CherryPicks.

  • StarTech.com
  • DBEIXIWEI
  • Syba
  • SIIG
  • XRIKUI
  • BZIZU
  • LinksTek
  • NOYITO
  • IO CREST
  • ELIATER

Top 10 Serial Port Cards Sellers: CPR Seller Rank List

CPR sellers rank is based on CherryPicks-AI bestselling ranking system that helps us analyze each seller's sales trends. The List of top seller ranks is our in-house data, essential for our product ranking to help you make the right shopping choice.

Rank Name Yearly Feedbacks Avg. Ratings
🥇 VirVentures 178,903 4.7
🥈 Triplenet Pricing INC 90,483 4.6
🥉 Technology Galaxy 75,674 4.6
4 Tech for Less 54,392 4.7
5 VPCI 34,823 4.7
6 KART IT 27,435 4.6
7 Hot Deals 4 Less® 24,468 4.7
8 ComegaCity 7,871 4.8
9 Gott Electronics 7,246 4.7
10 e-TekDepot 3,506 4.9
View or download top Serial Port Cards seller & rating report
VirVentures [178903] Triplenet Pricing INC [90483] Technology Galaxy [75674] Tech for Less [54392] VPCI [34823] KART IT [27435] Hot Deals 4 Less® [24468] ComegaCity [7871] Gott Electronics [7246] e-TekDepot [3506] VirVentures 35% Triplenet Pricing INC 18% Technology Galaxy 15% Tech for Less 11% VPCI 7% KART IT 5% Hot Deals 4 Less® 5% ComegaCity 2% Gott Electronics 1% e-TekDepot 1%

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"Free Shipping" means that you will not be charged additional fees for the shipping of that product. However, unlike "Prime," which usually guarantees fast two-day shipping, "Free Shipping" doesn't necessarily mean fast shipping.

Sometimes there might be a minimum purchase requirement to qualify for free shipping if you are not a Prime member. For Prime members, the "Free Shipping" usually refers to the free two-day shipping that is one of the benefits of the Prime membership.


Why Should You Trust Us?

Now hundreds and thousands of Computer Components supplies are available on Amazon, Picking the right one is not easy, and that may take a lot of your time, Right? and What is the best Serial Port Cards to buy for new October 2026?

CherryPicks’s Methodology for Evaluating Serial Port Cards

We developed the CherryRatings-AI system to identify and score reviews and the CherryPicks-AI ranking system that uses TensorFlow framework to generate the best list, It will help us evaluate Computer Components items that sell on Amazon. The score of items is based on over ten parameters such as analyzing customer review content, product reviewing rating statistics, brand reputation evaluation, comparing product price with features, etc, You can visit How We Rank to learn more in detail.

We collected and analyzed 134 of Serial Port Cards reviews based on our selection criteria. It helped us shortlist the top qualified and rated Serial Port Cards for Computer Components, We found that most customers choose Serial Port Cards with an average price of $45.11, and the top brands are StarTech.com, Syba, ELIATER, Dilwe, IO CREST, zdyCGTime, BestParts, PUSOKEI And SIIG. 

Then our expert-level editors reviewed all those quality items and selected the top 30 Serial Port Cards for you, We have researched hundreds of sellers and picked the top sellers for Computer Components, including Amazon Resale, VirVentures, Triplenet Pricing INC, Technology Galaxy, Tech for Less, VPCI, KART IT, Hot Deals 4 Less®, ComegaCity, Gott Electronics, e-TekDepot And CGTime. The StarTech.com 4-port PCI Express RS232 Serial Ad... are available for purchase right now, and The seller of #1 rank product has received honest feedback from 2 consumers with an average rating of 3.8.

We've helped a lot of satisfied users get the right Computers & Accessories product based on their needs, and save lots of time for them to pick Serial Port Cards to buy.


Written By Maria D. Stephens

Maria D. Stephens loves to write about electronic devices she has used. She also does not mind spending her money on new electronics with hype to verify if the product is worth the hype or just marketing done right. She will be providing us reviews on electronics she has used.