Best StarTech.com Serial Port Cards of 2025

The StarTech.com RS232 Card allows you to add two high-speed RS-232 serial ports to your low profile or small form factor computer. This is particularly useful if you need to connect legacy devices that rely on serial communication. With the PCI Express expansion slot, installation is straightforward, enabling you to enhance your system's connectivity without hassle. Additionally, the card is designed to fit compact spaces, ensuring that you do not compromise on performance in a smaller setup.

The StarTech.com PCIe Serial Adapter is a versatile solution that allows you to connect a single DB9 port with bi-directional RS232 speeds of up to 460.8Kbps. With its 256-byte FIFO buffer, you can ensure smooth data transmission, making it ideal for various applications. The optional configurable power feature gives you the flexibility to choose between 12v, 5v, or none, enhancing usability. Additionally, it comes with both standard and low-profile brackets, allowing for easy installation in different types of desktops or servers.

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 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 RS232 Adapter allows you to add two RS-232 serial ports to your computer via a PCI Express expansion slot. This is particularly useful for connecting legacy devices that require a serial connection, giving you flexibility in device management. The card is compatible with both standard and small form factor computers, ensuring convenience regardless of your system type. With its native support for the 16550 UART, you can expect reliable and efficient data transmission for your serial communications.

The StarTech.com PCIe Combo Card allows you to effortlessly add one parallel port and two RS-232 serial ports to your standard or low-profile computer using a PCI Express expansion slot. This means you can expand your connectivity options and connect additional devices, enhancing your setup. With its native PCI Express design, installation is straightforward, ensuring you can get up and running quickly. Additionally, the inclusion of the reliable 16550 UART ensures stable communication for your peripherals.

The StarTech.com RS232 Adapter features two DB9 ports that support bi-directional RS232 speeds of up to 921.6Kbps per port. With a 256-byte FIFO buffer, this ensures smooth data transmission for your devices. You can also configure the power supply options to suit your needs, choosing from 12v, 5v, or none, providing flexibility for various applications. The card comes with both standard and low profile brackets, making it easy to fit into different desktop or server setups.

The StarTech.com PCI Serial Card allows you to add a parallel port and two RS-232 serial ports to your PC via a PCI expansion slot. This means you can easily connect multiple devices, enhancing your system's connectivity. With the 2S1P design, you can enjoy the convenience of having both serial and parallel connections in one card. Furthermore, all three ports share a single IRQ, which helps to minimise the system resources needed to operate, ensuring efficient performance.

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.

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.