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After deep searching of an incredibly large number of articles and reviews by our brilliant Artificial Intelligence & ML algorithms; and detailed reprocessing, analysis and screening by our competent tech experts, the golden shortlist for the Best Serial Port Cards (2021) is finally prepared.

The ultimate guide on Best Serial Port Cards produced using Deep Learning and Artificial Intelligence technology

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In order to find the Best Serial Port Cards (2021), our intelligent platforms and gurus have taken many elements into account such as product fitness for use, features that meet buyers needs and give buyer satisfaction, freedom from deficiencies or defects, standards conformance, worthiness for money, robustness, robustness, quality conformance to needs and guidlines, protection and safety, real customer satisfaction and lots of others. It is worth to note that each user has different requirements so please consider the benchmarking below as a guide and not as a gospel. Nonetheless, in the ranking below you can undoubtedly find the overall best ones regardless of your needs.

Our intelligent platforms and dedicated technology experts work hard to provide you with the best product choices. We strongly believe that our review assessment can help you simplify your purchase decision and select among the truly Best Serial Port Cards (2021).

Best Serial Port Cards

Best Choice No. 1
StarTech.com 1 Port Low Profile Native RS232 PCI Express Serial Card with 16550 UART (PEX1S553LP)
  • Add a RS-232 serial port to your standard or small form factor computer through a PCI Express expansion slot
  • PCI Express Serial Card
  • PCI-e Serial Card
  • PCI Express RS232
  • RS232 Card
Best Choice No. 2
StarTech.com 2-Port PCI Express Serial Card with 16C1050 UART – RS232 Low Profile Serial Card – PCI Serial Card (PEX2S1050)
  • 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.
  • 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.
SaleBest Choice No. 3
PCIE 2 Port Serial Expansion Card PCI Express to Industrial DB9 RS232 COM Port Adapter WCH382 Chip for Desktop PC Windows 10 with Low Bracket
  • 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 16550 Fast Uart serial port, data transfer rate support up to 115200bps.
  • Plug and Play, Automatically selects IRQ & IO address, Supports IRQ sharing.
  • Compliant with ExpressCard/34mm Standard; Compatible to 1-Lane (x1) PCI-Express Throughput.
  • Operating System: Windows 32bit 2000/XP/2003 Server/Vista and 64bit XP/2003 Server/Vista/WIN7/WIN8/WIN10 / Linux. If there was any problem with PCIE 2 port serial expansion card, pls feel free to contact us, we will provide a solution within 24hrs.
Best Choice No. 4
Tripp Lite 2-Port DB9 (RS-232) Serial PCI Card with 16550 UART, Low Profile (PCI-D9-02-LP)
  • Adds 2 DB9 serial ports to your PCI computer or server or replaces existing DB9 ports
  • Each port supports data transfer rates up to 115.2 kbps
  • Compatible with Universal 3.3V and 5V 32-bit PCI/pci-x slots
  • Works with Windows and Linux
  • 1-Year Limited Warranty
Best Choice No. 5
StarTech.com 4 Port PCI Express RS232 Serial Adapter Card – Single-Lane PCI Express – Breakout Cable – RS232 Extension – PCIe Serial Card (PEX4S553B), red
  • Add 4 RS232 serial ports to any PC using a single PCI Express expansion slot
  • RS232 Card
  • PCI Serial Card Adapter
  • PCI Express Serial Card
  • PCI-e Serial Card
Best Choice No. 6
Syba Single Port RS-232 DB9 Serial PCI-e 2.0 x1 Expansion Card MCS9922 SD-PEX15021
  • MCS9922 Chipset
  • Compatible with Industrial Standard 16C550 UART. On Chip 256-byte Depth FIFO in Transmit.
  • Transfer data rates up to 250Kbps on each port. Supports hardware and software flow control. Supports 5, 6, 7, 8-bit Serial format
  • Fully compliant with PCI-Express base Specification Revision 1. 0a
  • Single-lane (x1) PCI-Express with throughput up to 2. 5Gbps
Best Choice No. 7
PCIe Combo Serial Parallel Expansion Card PCI Express to Printer LPT Port RS232 Com Port Adapter IEEE 1284 Controller Card WCH382 Chip for Desktop PC Windows 10 with Low Bracket
  • This card capability allow for upgrade with additional serial or parallel cards to your computer easily. Note: Open the “CH38XDRV”file in the CD to install.
  • Multi-mode IEEE 1284 compliant controller (SPP, PS2, EPP, ECP), Faster data rates up to 1.5Mbps for parallel port.
  • Plug and Play, Automatically selects IRQ & IO address, Supports IRQ sharing.
  • Compliant with ExpressCard/34mm Standard; Compatible to 1-Lane (x1) PCI-Express Throughput.
  • Operating System: Windows 32bit 2000/XP/2003 Server/Vista and 64bit XP/2003 Server/Vista/WIN7/WIN8/WIN10 / Linux. If there was any problem with PCIe combo serial parallel expansion card, pls feel free to contact us, we will provide a solution within 24hrs.
Best Choice No. 8
Rosewill Dual Serial Ports PCI Card Components RC-301
  • PCI to Serial Port Card
  • External Ports: 2 x 9 pins serial connectors
  • Data Transfer Rate: 115200bps
  • Operating Systems Supported: Windows 2000, Windows XP/2003/Vista 32/64 bit, Windows 7 32/64 bit, Windows 8 32/64 bit, Windows 10, Linux
  • Chipset: MOSCHIP MCS9835CV
Best Choice No. 9
StarTech.com 2 Port Native PCI Express RS232 Serial Adapter Card with 16550 UART (PEX2S553)
  • Add 2 RS-232 serial ports to your standard or small form factor computer through a PCI Express expansion slot
  • RS232 Card
  • PCI Express Serial Card
  • PCI-e Serial Card
  • PCI Express RS232
Best Choice No. 10
SIIG Legacy and Beyond Series 2 Port (Dual) Serial / RS-232 PCIe Card with 16C550 UART
  • Quickly adds two serial ports through an available PCI Express slot
  • Supports serial port data transfer rates up to 115.2 Kbps, compatible with 16C550 UART
  • 256-byte depth FIFO buffer supports fast data transfer especially in a multitasking environment
  • Perfect solution to connect with POS system, industrial testing and control device, security system, logistic management equipment, etc.
  • Chipset: ASIX/MosChip MCS9900CV-AA

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