The 6 Best 8 Port Serial cards (2023 reviews)

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

Why We Like This:

2 x 16c550 fast uart serial ports, supporting data transfer rates up to 230400bps
Simple and easy to hook up
Plug and play, automatically selects irq & io address, supports irq sharing

Best Runner up: Syba 8 Port Serial Card

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Syba line of card come in a pretty wide variety of styles, so you can definitely find one that suits your individual preferences and needs.

Why We Like This:

Fast data rates up to 1 mbps
Build-in 16c550 compatible uart with 16 byte transmit-receive fifo
Supports 8 independent db9 rs232 serial ports

Best For System upgrades: Startech PCIE 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 startech pcie serial card and it's widely considered as card that has the most suitable features. This pci express serial card adds 16 high-speed rs232 ports to your standard or low-profile desktop or server pc. It includes a low-profile bracket making it compatible with both full profile and low profile pc chassis slots. It is compatible with a broad range of windows and linux operating systems. It is compliant with the pci express 1.0a specification, and it's compatible with 1x, 2x, 4x, 8x and 16x pcie express slots.

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 express (pcie) slot. 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. 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.

Why We Like This:

Control/monitoring of surveillance/security cameras and systems
One of the new comers and featured product

Best For retro Pcs: Linkstek 8 Port Serial Card

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Compared with other card in this category, the linkstek 8 port serial card has a convenient design. It is great for retro pcs, better than usb. It is based on asix ax99100 solution that is compatible with most windows and linux systems. It is compatible with iee 1284 standard db25 pin parallel lpt port. It will light up 2x db25 ports for devices on desktop pcs. It is perfect to add on for serial connection on your computer. The low profile bracket in the package will work on slim PCs.

Why We Like This:

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

Best For other applications: Pasotim 8 Port Serial Card

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Not everyone likes to purchase card for their daily usage, but the pasotim 8 port serial card would be an anomoly. The PCIE 8db9 expansion card is equipped with an heat sink with strong thermal conductivity, which can prevent the chip from burning out for a long time and extend the life of the adapter card. It can multiple serial port devices such as pc, terminal, modem, printer, scanner, etc. It provides the setting control signal, guarantees serial port equipment, and peripheral compatibility allows you to install the multi-serial card in the shared pc or server.

The package is equipped with a small baffle of 8 cm, which can not only be used for the small PC cases of 415 x 300 x 100 mm. It is designed for, ATM and other applications.

Why We Like This:

Good investment for long term
Lot of satisfied buyers

Best value For money: Startech 8 Port Serial 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 db9 to pcie adapter is ideal for system upgrades in a wide range of applications including manufacturing equipment, pos equipment, and security devices. 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 port pci express serial card is compliant with pci express 1.0a specification, and it is 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
Maximum data transfer rate of 460kbps
Serial card was easy install and setup
Performance serial communication, with support for data transfer rates of up to 460kbps