Best Serial Port Cards In September 2026

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Below is the top 10 Best Serial Port Cards review to guide you buy the best product. Choose one of these products and your satisfaction is guaranteed!

To help you in your search, we have completed this list of the Best Serial Port Cards.

Top Rated Best Serial Port Cards Of 2026

Rank	Product Name	Score
1	2 Port Industrial DB9 RS-232 Serial PCI Card - Serial COM Port RI Buy Now	9.7 Buy Now
2	Syba Single Port RS-232 DB9 Serial PCI-Express 2.0 x1 Card - 1 Port Buy Now	9.5 Buy Now
3	DTECH 10 Feet USB 2.0 to RS232 DB9 Serial Port Adapter Cable Buy Now	9.1 Buy Now
4	ELIATER PCIE 2 Port Serial Expansion Card PCI Express to Industrial DB9 RS232 Buy Now	8.8 Buy Now
5	GODSHARK PCI to DB25 LPT Parallel Port Expansion Card with Low Profile Bracket Buy Now	8.6 Buy Now
6	GODSHARK PCIe Serial Expansion Card, 2 Port PCI Express 1.0 x 1 to Buy Now	8.3 Buy Now
7	shinedisk 2 Port PCIe Serial Expansion Card, PCI Express 1.0 x 1 to Buy Now	8.1 Buy Now
8	PCIe Combo Serial Parallel Expansion Card PCI Express to Printer LPT Port RS232 Buy Now	7.8 Buy Now
9	StarTech.com 9 Pin Serial Male to 10 Pin Motherboard Header LP Slot Plate Buy Now	7.5 Buy Now
10	StarTech.com 2-Port PCI Express Serial Card with 16C1050 UART - RS232 Low Profile Buy Now	7.2 Buy Now

1. 2 Port Industrial DB9 RS-232 Serial PCI Card - Serial COM Port RI

• Jumper settings: (voltage for pin 1 and 9 of each serial db9 connector/ri+5v+12v
• Supports both standard profile and low profile computer chassis
• Compatible to industrial standard 16c450, 16c550, 16c552 and enhanced uart
• Supports both standard profile and low profile computer chassis
• Supports multiple cards on one pc
• Fully compliant with pci local bus specification revision 2. 3

2. Syba Single Port RS-232 DB9 Serial PCI-Express 2.0 x1 Card - 1 Port

• Compatible with industrial standard 16c550 uart. on chip 256-byte depth fifo in transmit.
• Mcs9922 chipset
• Fully compliant with pci-express base specification revision 1. 0a
• Form factor: low profile
• Transfer data rates up to 250kbps on each port. supports hardware and software flow control. supports 5, 6, 7, 8-bit serial format
• Single-lane (x1) pci-express with throughput up to 2. 5gbps

3. DTECH 10 Feet USB 2.0 to RS232 DB9 Serial Port Adapter Cable

• Usb to male serial port adapter is designed for connecting serial devices such as db9 equipped pc, router, gps, programming machine, barcode scanners, label writers, serial modem, digital camera, card reader, palm pcs and digital organizer, etc
• 10ft db9 to usb adapter with 9 pin male to usb-a male gold plated connector uses crystal clear blue enrich injection, strong and beautiful, active pins: 2(rxd), 3(tdx), and 5(gnd)
• The com port to usb converter is designed with a high performance quality processor chip (ft232rl), which makes this usb rs232 adapter one of the most reliable adapters on the market
• Dtech usb to serial adapter ft232 cable allows your computer to make communication with serial devices equipped with 9 pin female rs232 interface
• (ft232 chip) long ftdi serial cable for windows 10, 8, 7, mac os 8 or higher, linux 2.4.0 and later

4. ELIATER PCIE 2 Port Serial Expansion Card PCI Express to Industrial DB9 RS232

• Operating system: windows 32bit 2000/xp/2003 server/vista and 64bit xp/2003 server/vista/win7/win8/win10 / linux.if you could not install the driver, you can download the driver by clicking the following link: http://www.mediafire.com/file/w59rqskfii3hz0t/-e38x.exe/file
• 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.
• This card capability allow for upgrade with additional serial cards to your computer easily.
• Compliant with expresscard/34mm standard, compatible to 1-lane (x1) pci-express throughput.

5. GODSHARK PCI to DB25 LPT Parallel Port Expansion Card with Low Profile Bracket

• Interface type: pci to 25 port parallel port, pci to db25.
• Generally used for printers, other equipment that needs to be addressed is not applicable and is not suitable for encrypted dogs
• Chip: wch ch351q chip.
• Driver supports for win xp, win7, win8. don't support win10 operation system.
• If you connect to the printer and install the drive, you need to set the printer's port and the card to be consistent. the port of the card can be seen in device manager.

6. GODSHARK PCIe Serial Expansion Card, 2 Port PCI Express 1.0 x 1 to

• Two (2) 9-pin rs-232 serial ports.
• Support dos, windows 98 / me / nt4.0 / 2000 / xp / vista / win7 / win8 / server 2003 & 2008 / linux operating systems.
• Pci express x1 interface (will also work on pci-e x4, x8, x16 slot).
• Pci express single-lane (x1) bus bandwidth 2.5 gbps.
• Compliant with pci express specification revision 1.1.

7. shinedisk 2 Port PCIe Serial Expansion Card, PCI Express 1.0 x 1 to

• Support dos, windows 98 / me / nt4.0 / 2000 / xp / vista / win7 / win8 / server 2003 & 2008 / linux operating systems
• Compliant with pci express specification revision 1.1
• Pci express single-lane (x1) bus bandwidth 2.5 gbps
• Two (2) 9-pin rs-232 serial ports
• Pci express x1 interface (will also work on pci-e x4, x8, x16 slot)

8. PCIe Combo Serial Parallel Expansion Card PCI Express to Printer LPT Port RS232

• Operating system: windows 32bit 2000/xp/2003 server/vista and 64bit xp/2003 server/vista/win7/win8/win10 / linux.if you could not install the driver, you can download the driver by clicking the following link: http://www.mediafire.com/file/w59rqskfii3hz0t/-e38x.exe/file
• Plug and play, automatically selects irq & io address, supports irq sharing.
• This card capability allow for upgrade with additional serial or parallel cards to your computer easily.
• 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.

9. StarTech.com 9 Pin Serial Male to 10 Pin Motherboard Header LP Slot Plate

• Conveniently add an external db9 serial port
• 9pin serial male to 10pin idc female conforms to apex10-everex-intel specification
• Connects to your motherboard and adds an additional db9 serial port to the back of your pc
• Easy to use and install
• Backed by startech.com's lifetime warranty

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

• 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.
• The startech.com advantage: startech.com offers a 2-year warranty, free lifetime technical support on this dual port serial to pcie card and has been the choice of it businesses since 1995.
• 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.