Add two RS232, & two RS422/485 serial ports to your PC through a PCI-Express expansion slot. The PEX4S232485 4 Port PCI Express PCIe Serial Combo Card
- 2 x RS232 2 x RS422 / RS485 lets you add two RS232, & two RS422/485 serial ports to your PC through a PCI-Express expansion slot. This PCI express serial card is a single card solution that is compatible with nearly any serial communication protocol, supporting RS-232, RS-422, RS-485 2-wire or RS-485 4-wire operating modes. A flexible solution for adding serial ports to full-sized, or small form factor systems, the 4-port serial card

Includes:: both low & full profile brackets while the included breakout cable helps to avoid cluttered connections.


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Add two RS232, & two RS422/485 serial ports to your PC through a PCI-Express expansion slot. The PEX4S232485 4 Port PCI Express PCIe Serial Combo Card
- 2 x RS232 2 x RS422 / RS485 lets you add two RS232, & two RS422/485 serial ports to your PC through a PCI-Express expansion slot. This PCI express serial card is a single card solution that is compatible with nearly any serial communication protocol, supporting RS-232, RS-422, RS-485 2-wire or RS-485 4-wire operating modes. A flexible solution for adding serial ports to full-sized, or small form factor systems, the 4-port serial card

Includes:: both low & full profile brackets while the included breakout cable helps to avoid cluttered connections.


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Add 4 external USB (Universal Serial Bus) 3.0 ports to a low profile or standard computer, through PCI Express. The PEXUSB3S4V PCI Express USB (Universal Serial Bus) 3.0 Card (with SATA Power) adds 4 external USB (Universal Serial Bus) 3.0 ports to any PCI Express-enabled computer system with support for data rates up to 5 Gbps, while remaining backward compatible with USB (Universal Serial Bus) 2.0 / 1.x devices. Enhanced with UASP support (USB Attached SCSI Protocol), this USB (Universal Serial Bus) 3.0 controller performs up to 70% faster than conventional USB (Universal Serial Bus) 3.0 when paired with a UASP supported enclosure (Note: UASP requires a compatible operating system). Using a more efficient protocol than the traditional USB (Universal Serial Bus) BOT (Bulk-Only Transport), UASP technology optimizes transfers by allowing multiple commands to be processed simultaneously, significantly increasing transfer speeds for less wait time on data transfers. The card uses a "stacked" port layout that places the ports one on top of the other, enabling all four USB (Universal Serial Bus) 3.0 ports to be external facing, while still allowing the card to fit into a small form factor/low profile computer system using the included low profile bracket. Plus, with a built-in SATA power connector, each USB (Universal Serial Bus) port can provide up to 900m A of power to devices that draw power from a host bus connection (500m A for USB (Universal Serial Bus) 2.0) by connecting to your computer power supply. UASP is supported in Windows 8, Server 2012 & Linux kernel 2.6.3 or later. In testing UASP performed with up to a 70% faster read / 40% faster write speed over traditional USB (Universal Serial Bus) 3.0 at peak performance. At the same peak in testing, UASP also showed up to an 80% reduction in required processor resources. Test results were obtained using an Intel Ivy Bridge system, Star Tech.com add-on USB (Universal Serial Bus) 3.0 cards, a UASP-enabled Star Tech.com enclosure, & a SATA III solid state drive. ...

Add 4 external USB (Universal Serial Bus) 3.0 ports to a low profile or standard computer, through PCI Express. The PEXUSB3S4V PCI Express USB (Universal Serial Bus) 3.0 Card (with SATA Power) adds 4 external USB (Universal Serial Bus) 3.0 ports to any PCI Express-enabled computer system with support for data rates up to 5 Gbps, while remaining backward compatible with USB (Universal Serial Bus) 2.0 / 1.x devices. Enhanced with UASP support (USB Attached SCSI Protocol), this USB (Universal Serial Bus) 3.0 controller performs up to 70% faster than conventional USB (Universal Serial Bus) 3.0 when paired with a UASP supported enclosure (Note: UASP requires a compatible operating system). Using a more efficient protocol than the traditional USB (Universal Serial Bus) BOT (Bulk-Only Transport), UASP technology optimizes transfers by allowing multiple commands to be processed simultaneously, significantly increasing transfer speeds for less wait time on data transfers. The card uses a "stacked" port layout that places the ports one on top of the other, enabling all four USB (Universal Serial Bus) 3.0 ports to be external facing, while still allowing the card to fit into a small form factor/low profile computer system using the included low profile bracket. Plus, with a built-in SATA power connector, each USB (Universal Serial Bus) port can provide up to 900m A of power to devices that draw power from a host bus connection (500m A for USB (Universal Serial Bus) 2.0) by connecting to your computer power supply. UASP is supported in Windows 8, Server 2012 & Linux kernel 2.6.3 or later. In testing UASP performed with up to a 70% faster read / 40% faster write speed over traditional USB (Universal Serial Bus) 3.0 at peak performance. At the same peak in testing, UASP also showed up to an 80% reduction in required processor resources. Test results were obtained using an Intel Ivy Bridge system, Star Tech.com add-on USB (Universal Serial Bus) 3.0 cards, a UASP-enabled Star Tech.com enclosure, & a SATA III solid state drive. ...

PCI Express to Serial Adapter 921.6 Kbps Windows & Linux Compatible. This PCI Express RS232 serial adapter card lets you add four RS232 (DB9) serial ports to your computer through a PCI Express (PCIe) slot,  as if they were native serial ports. The 4 port PCIe serial card enables you to interact with serial devices, such as card readers, printers, PIN pads, & modems, at speeds of up to 921.6 Kbps. Maximum Compatibility With broad OS support, including for Windows & Linux, this multiport PCI E serial card is easy to integrate into mixed environments. The card comes pre-configured with a full-sized bracket, &

Includes:: an optional low-profile bracket, so installation is easy regardless of the case form factor. This expansion card is a direct replacement for PEX4S952 (LINK). Experience Optimal Technology This PCIe to serial adapter supports the following

Features: Industry standard 16950 UART compatible Supports max baud rate of up-to 921.6 Kbps Provides 5/12V power output on Pin 9 when external power is connected 256-byte depth FIFO cache per transmitter & receiver Supports 9, 8, 7, 6, 5 data bits  (one per port) Asix AX99100 chipset Base PCI Express 1.1 compliant The Choice of IT Pros Since 1985 Star Tech.com conducts thorough compatibility & performance testing on all our products to ensure we are meeting or exceeding industry standards & providing high-quality products to IT Professionals. Our local Star Tech.com Technical Advisors have broad product expertise & work directly with our Star Tech.com Engineers to provide support for our customers both pre and post-sales. PEX4S953 is backed by a Star Tech.com lifetime warranty & free lifetime technical support.



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Get more out of your serial devices! Star Tech.coms PEX4S950 gives you two high performance 16C950 serial UART channels/ports for connecting any new or old serial peripheral, with data transfer rates of up to 250 Kbits/sec. Perfect for connecting serial modems, POS devices, PDAs, digital cameras, printers, ISDN terminal adapters & more, to your system. Installation is a breeze with support for Windows XP, ME, 2000, 98, 95 & NT4. Plus, IRQ sharing & a PCI plug & play interface, guarantee convenient, hassle-free connections. ...

Get more out of your serial devices! Star Tech.com's PEX4S950 gives you two high performance 16C950 serial UART channels/ports for connecting any new or old serial peripheral, with data transfer rates of up to 250 Kbits/sec. Perfect for connecting serial modems, POS devices, PDAs, digital cameras, printers, ISDN terminal adapters & more, to your system. Installation is a breeze with support for Windows XP, ME, 2000, 98, 95 & NT4. Plus, IRQ sharing & a PCI plug & play interface, guarantee convenient, hassle-free connections. ...

Add 4 high-speed RS-232 serial ports to your computer with a buffered serial card from Star Tech.com. The card uses a 16-Byte buffer in both the receive & transmit channels simultaneously, reducing the number of CPU interrupts & improving system performance. Compatible with both 3.3 & 5 volt motherboards, & uses DB9 connectors for use with a wide range of serial peripherals. Suitable for industrial applications, this card is compatible with a wide range of operating systems, including Windows, DOS, Linux, & Unix. ...

Add 4 high-speed RS-232 serial ports to your computer with a buffered serial card from Star Tech.com. The card uses a 16-Byte buffer in both the receive & transmit channels simultaneously, reducing the number of CPU interrupts & improving system performance. Compatible with both 3.3 & 5 volt motherboards, & uses DB9 connectors for use with a wide range of serial peripherals. Suitable for industrial applications, this card is compatible with a wide range of operating systems, including Windows, DOS, Linux, & Unix. ...

Add 4 high-speed RS-232 serial ports to your PC through a PCI expansion slot. The PCI4S550N 4-port PCI Serial card turns an available PCI slot into four RS232 serial ports
- a cost-effective solution for connecting any new or old serial peripheral, with support for data transfer rates of up to 115 Kbps. The PCI Serial card is a perfect solution for connecting serial modems, POS devices, PDAs, digital cameras, printers, ISDN terminal adapters & more, to your system without having to upgrade your peripheral devices for compatibility with newer standards (e.g. USB). Saving time & hassle, the Serial PCI card is plug-&-play ready, & can be installed in minutes, supporting Windows 7, Server 2008 R2, Vista, XP, ME, 2000, 98, 95, NT4, 3.1, DOS & Linux operating systems. Plus, the serial card offers IRQ sharing to help ensure stability & consistent performance, guaranteeing convenient, hassle-free connections.
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