The 6 Best PCI Express 9 pin Serial cards (2023 reviews)

If you often find yourself confused about convenient and suitable card, startech serial adapter card is your solution. It is a great way to get rs232 ports on pc without one. The PCI Express serial card lets you turn a pci express slot into 2 rs232 (db9) serial ports. It gets power from the pci express slot. The card is easy to install, and Windows 7 automatically installs the driver. It works well with windows 11, which automatically downloads the drivers.

There are several flavors of PCI, PCI, PCI Express x1, PCI Express x16, and these use different edge connectors. The PEX2S553 is compliant with PCI Express base specifications revision 1.0a and will also function on a PCIe Gen 3.0 and PCIe Gen 4.0 slot. It will also work in a small form case or the larger cases.

Why We Like This:

Works in a pcie 1x slot
Easy install and setup on windows 10 desktop
Driver software was a seamless install

SIIG PCI Express 9 pin Serial Card

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Next on the list, we've got yet another card that manages to win our hearts. It's the siig pci express 9 pin serial card and it's widely considered as card that has the most suitable features. It is great for older serial port equipment. It is easy to find parallel/serial port cards that work with win. It is great for adding an internal USB 3 connection. The dongle that is required for the printer to work with the installed software is detected by the card and works perfectly too. It is rock solid and consistent with no latency. This will support half-height (otherwise known as low profile) card slots. The extra serial ports are nice to have as well.

Why We Like This:

Comes with adapter cables for either one
Flawless alternative for modern pcie/ system boards
Easy to setup in windows 10, no problems with after several months

Pusokei PCI Express 9 pin Serial Card

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If you want nothing but the best reliable card, then pusokei pci express 9 pin serial card is the one you should definitely consider, as it manages to bring a lot to the table. It is designed for pos and atm applications, and a smart choice for industrial automation system integrators. The four RS232 serial ports of the riser card can support communication speeds up to 250kbps and provide modem control signals to ensure compatibility with various peripheral serial devices.

Why We Like This:

Support a variety of mainstream operating systems
Stable and effective control of data loss
Expand 4 independent 9-pin standard serial ports, like the built-in serial port data interface

SIIG Serial Port

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Not everyone likes to purchase card for their daily purpose, but the siig serial port would be an anomoly. It offers a convenient solution for connecting modern or legacy equipment to newer computer systems that do not have rs232 or parallel ports. It is a great solution to connect with pos systems, industrial testing and control devices, security systems, logistic management equipment, vinyl cutter, printers, scanners, and etc. It comes with a standard-profile bracket installed, and also an optional low-profile bracket included in the package.

It is a dual-profile design which fits full height and low-profile system chassis with the included spare low-profile brackets. The cutter is serial port interface only, no USB ports. The serial card can decrease the loading on cpu activity which helps ensure optimal system performance and keep errors from happening. The cutter is a serial port interface only, with no USB ports. It is a lower budget saving alternative compared to buying a new one.

Why We Like This:

Single-lane (x1) pci express end-point controller with phy integrated
Easy to install and works great
Lot of satisfied buyers

X-Media PCI Express 9 pin Serial Card

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Best part: x-media pci express 9 pin serial card costs comparatively low and it is available to ship in 24 hours. The XM-Pex-2s dual rs232/serial port pci express (pcie) adapter card is designed to add two 9-pin rs232/serial ports to your pci express enabled desktop computer.

Why We Like This:

Data transfer rate up to 115kbps on each port
Standard and low profile bracket included
Compatible with 16c550/16c552/16c554 and 16c750 uart

Startech PCI Express 9 pin Serial Card

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The startech pci express 9 pin serial card should be able to handle its purpose and duties with ease. 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. It includes both low profile/half-height and full profile brackets to ensure fitment into a broad range of system form factors. The port serial card includes both low and full profile brackets while the included breakout cable helps to avoid cluttered connections. It works with setup file additionally it is easy to install and it works.

The board is a bit long, but it fits in half height (full height bracket included) systems, and the PCIe demands are modest. This card will add four ports for you. The breakout cable gives you multiple connections of a couple varieties.

Why We Like This:

Monitor and control industrial machines on an assembly line or in a production environment
Rs232 data transfer rates up to 460 kbps
Supports 2-wire / 4-wire rs485 modes
A wonderful device for connecting newer pc's to older hardware