The 8 Best PCI RS232 Serial Adapter cards (2023 reviews)

This PCI card installs easily and setup is a "breezeeze" connection. It is a high performance adapter card to add two rs. It is easy to find parallel/serial port cards that work with win. It comes as a full-height card, but includes brackets that can be swapped in (with a screwdriver) to reduce this 1 full height card down to 2 half height (low profile) slots. It is a perfect solution to connect with a system, industrial testing and control device, security system, logistic management equipment, etc. It is great for adding an internal USB 3 connection. This version has an updated UART with larger buffers that are highly adjustable. The extra serial ports are nice to have as well.

Why We Like This:

Easy to install with no issues
Comes with adapter cables for either one
Flawless alternative for modern pcie/ system boards
Worked well and set up easily

Eliater PCI RS232 Serial Adapter Card

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This card installs in a new computer using an updated bus and it works perfectly. It is allows for full height or half height applications. This card capability allows for upgrade with additional serial cards to your computer easily. It works with windows 10 and comes with less and less connection options.

Why We Like This:

Multi card capability allow for upgrade with additional serial or parallel cards
Simple and easy to hook up
Plug and play, automatically selects irq & io address, supports irq sharing

Startech PCIE Serial Card

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The startech pcie serial card is capable of outshining several other card featured in this list in overall features for the price point. This PCI express serial card adds 16 high-speed rs232 ports to your standard or low-profile desktop or server pc. It comes with two breakout cables of 8 ports each, and the pcie serial card maximizes the density of db9 rs232 ports on a server or desktop computer. It includes a low-profile bracket making it compatible with both full profile and low profile pcie expansion slots. It is ideal for system upgrades in a wide range of applications, including manufacturing equipment, pos equipment, security devices such as surveillance cameras, and environment or building control systems.

This lets you maximize the number of available db9 rs232 ports that are available for connecting your serial-based devices and equipment, while using only a single pcie expansion slots. It’s the perfect solution for adding the serial ports you need, even if your desktop pc or server only has a limited number of pcie expansion slots. It is compliant with the pci express 1.0a specification, and it's compatible with 1x, 2x, 4x, 8x and 16x pci express slots.

Why We Like This:

Control/monitoring of surveillance/security cameras and systems
New and hot release

Linkstek PCI RS232 Serial Adapter Card

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The linkstek pci rs232 serial adapter card is capable of outshining several other card featured in this list in overall features in its price range. It is great for retro pcs, better than usb. It is compatible with ieee 1284 standard db25 pin parallel lpt port. The low profile bracket in the package will work on slim PCs. It will light up 2x db25 ports on desktop pcs. It is perfect to add on for serial connection on your computer. It is based on asix ax99100 solution that is compatible with most windows and linux systems.

Why We Like This:

Will support most of windows and linux systems
Works on intel, amd, arm hardware platform
Good investment for long term

Startech PCI RS232 Serial Adapter Card

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This 2-port pci express serial card adds two high-performance rs232 serial ports to your device, for connecting your serial-based devices and equipment. The dual port serial pci express card can be installed into an available pci express slot, to provide two high. The serial card provides cpu load decrease which helps ensure optimal system performance and prevent errors such as overruns by preserving resources.

The dual port serial pci express card is compliant with pci express 1.0a specification, and it's compatible with 1x, 2x, 4x, 8x and 16x pci express slots. The channel uart card ensures smooth performance, even while both ports are in use. It offers a convenient solution for connecting modern or legacy equipment to newer computer systems that don't have rs232 ports.

Why We Like This:

Out-of-band hardware flow control using rts / cts
Serial card was easy install and setup
Performance serial communication, with support for data transfer rates of up to 460kbps
In-band software flow control using programmable xon/xoff in both directions

DTECH PCI RS232 Serial Adapter Card

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Next on the list, we've got yet another card that manages to win our hearts. It's the dtech pci rs232 serial adapter card and it's widely considered as one of the best convenient card you can buy. 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.

Why We Like This:

232 db9 serial port for your computer to connect multiple legacy serial devices
Turns a pci expansion slot into 2 rs
Lot of satisfied buyers

10Gtek PCI RS232 Serial Adapter Card

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Next on the list, we've got yet another card that manages to win our hearts. It's the 10gtek pci rs232 serial adapter card and it's widely considered as card that has the most suitable features.

Why We Like This:

Supports linux kernel 4.x/3.x/2.6.x, windows xp/vista/win7/win8/win8.1/win10 32/64bit and etc
Good investment for long term

X-Media PCI RS232 Serial Adapter Card

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Compared with other card in this category, the x-media pci rs232 serial adapter card has a convenient design. 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: