Best StarTech.com Serial Port Cards of 2026

The StarTech PEX2S953 Card is a versatile serial adapter that provides two DB9 ports with fast bi-directional RS232 communication, reaching speeds up to 921.6Kbps. This ensures smooth and reliable data transfer for your devices. You can configure the power supply on each port individually, choosing between 12v, 5v, or no power, which adds flexibility for various connected equipment. The card includes both standard and low-profile brackets, making installation in different desktop or server setups easy. It supports multiple operating systems, including Windows and Linux, making it a practical choice for diverse uses.

The StarTech PEX1S953LP Serial Card offers a single RS232 DB9 port with speeds up to 921.6Kbps, ideal if you need fast, reliable serial communication. Its 16950 UART and 256-byte FIFO buffer improve data handling, reducing delays. You can also choose the power supply voltage (12v, 5v, or none) to suit your device requirements, adding flexibility. Plus, the card comes with both low profile and standard brackets, making it easy to fit into a variety of desktop or server cases. It supports Windows XP and later, as well as Linux, so you can use it across many systems.

The StarTech.com Serial PCIe Card is a versatile 2-port solution that allows you to connect RS-232, RS-422, and RS-485 devices independently. With on-board DIP switches, you can easily configure each port to suit your specific needs. The card also features configurable power options, providing flexibility for various applications. Additionally, LED indicators keep you informed about data transmit and receive status, enhancing your control and monitoring capabilities. This makes it an ideal choice for desktops and servers in diverse settings.

The StarTech.com PCIe Combo Card is designed to enhance your computer by adding both a DB25 parallel port and an RS232 serial port using an x1 PCIe 2.0 slot. With parallel speeds reaching up to 2.5 Mbps, you can enjoy fast data transfers for printers and other devices. This card supports multiple modes, including SPP, Switching, and ECP, allowing for versatile connectivity options. Additionally, its compatibility with IEEE 1284 ensures that you can connect a wide range of legacy devices with ease.

The StarTech USB Serial Adapter allows you to easily add an RS232 serial port to any system with a free USB motherboard header. This means you can connect older serial devices to modern computers without hassle. It functions as a USB to serial converter, providing a straightforward way to link USB ports to serial devices. Additionally, the adapter supports USB to RS232 and USB to DB9 connections, offering flexibility for various hardware needs. The bus-powered design ensures it draws power directly from the USB port, making installation simple and tidy.

The StarTech PCIe Serial Card is an 8-port serial controller designed to provide reliable RS232 connections with speeds up to 921.6Kbps per port. It features a 16C1050 UART chipset and robust 15kV ESD protection, helping to safeguard your devices from electrical surges. You can configure power output on pin 9 with options for 12v, 5v, or none, offering flexibility for varied equipment needs. The card is compatible with Windows systems from XP onwards, making it suitable for desktops and servers, and includes a handy 18-inch DB62 to 8x DB9 breakout cable for easy setup.

The StarTech PEX16S550LP Card allows you to add sixteen RS232 serial ports to your computer via a PCI Express slot, ideal for expanding connectivity. It offers high-speed serial communication with data transfer rates up to 921.6 Kbps, ensuring efficient and fast data exchange. This multiport serial adapter is compatible with various PCIe bus speeds from 1x to 16x, providing flexibility for different systems. Whether your computer supports low or full-profile cards, this device fits both, making installation straightforward and convenient.

The StarTech PCIe Serial Card allows you to connect RS232 (DB9) serial devices directly to your computer, making it ideal for a variety of uses. It features a high-performance 16C1050 UART, ensuring smooth and reliable data transmission. The built-in LED status lights help you easily monitor activity on the card, giving you quick feedback. Additionally, it supports numerous devices like barcode scanners, receipt printers, and medical equipment, while providing power options via pin 9. This card also comes with a low-profile bracket for versatile installation in different PCs.

The StarTech.com PCIe Serial Card features a native single chip design, ensuring reliable performance for your serial connections. With the inclusion of both full profile and low profile/half-height brackets, you can easily install it in various systems. Each port is equipped with a 256-byte depth FIFO, enhancing data handling for transmit and receive tasks. Additionally, the single-lane PCI-Express interface offers impressive throughput of up to 2.5Gbps, making it ideal for fast and efficient data transfer.

The StarTech.com Serial Expansion Card provides four DB9 ports, allowing you to connect multiple devices simultaneously. With bi-directional RS232 speeds of up to 921.6Kbps per port, you can enjoy fast data transfer for your applications. The card features an optional configurable power supply, enabling you to tailor the power to each port according to your needs. Additionally, the standard and low-profile brackets make installation versatile, ensuring compatibility with various desktop and server setups.