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| Best Seller  | StarTech.com 2-port PCI Express RS232 Serial Adapter Card PCIe RS232 Serial Host Controller Card PCIe to Serial DB9 COM Ports 16950 UART Low Profile Expansion Card Windows/macOS/Linux - Full/Low-Profile (PEX2S953LP) - serial adapter - PCIe - RS-232 x 2 more | FREE shipping go to store |
 | Add eight RS-232 DB9 serial ports to your desktop computer through two PCIe expansion card slots. This PCI express serial card with two breakout cables provides you with multiple ports to connect a wide variety of serial peripherals at speeds of up to... more | $37.16 $34.71 FREE shipping go to store |
| Best Seller  | StarTech 2 Port Low-Profile Native RS232 PCI Express Serial Card with 16550 UART Add 2 high-speed RS-232 serial ports to your low profile/small form factor compu more | $43.20 $35.79 go to store |
 | StarTech 8-Port PCI Express RS232 Serial Adapter Card PEX8S1050 Add eight RS-232 DB9 serial ports to your desktop computer through a PCIe expansion card slots. This PCI express serial card with 8-port breakout cable provides you with multiple ports to connect a wide variety of serial peripherals at speeds of up to... more | $209.99 $186.99 FREE shipping go to store |
 | SYBA Multimedia 4-port Serial Adapter - PCI Express x1 - 4 x DB-9 RS-232 - Serial Via Cable - Plug-in Card - Retail more | $49.00 $37.79 FREE shipping go to store |
 | 4-Port Industrial USB to RS-232/422/485 Serial Adapter - 15 kV ESD Protection more | go to store |
 | Startech PCI-E Serial Parallel Combo 2S1P PCI Express Serial Parallel Combo Card with Breakout Cable Add a parallel port and two RS-232 serial ports to your PC through a PCI-Express expansion slot.- SKU: ZX9DHPEX2S1P553B more | $53.96 $46.17 FREE shipping go to store |
 | Siig AC Quad Serial Port RS232 Pcie Card 256 Bytes Brown Box Black SIIG s Quad-Serial Port RS-232 PCIe Card is designed to provide four 9-pin RS-232 serial ports to your PCI Express-enabled desktop computer. This 4-port serial PCIe adapter card features 256-byte FIFO buffers to support fast data transferring to ensure... more | FREE shipping go to store |
 | Digi International EP-USB-4 4-4 RS-232 Serial DB-9 Digi Edgeport USB-to-Serial Converters & Adapter Digi Edgeport USB-to-serial converters offer instant I/O expansion for peripheral device connectivity. An out-of-the-box (external) alternative to PCI cards Edgeport makes it easy to add serial and USB ports to a PC server or thin client in minutes -... more | go to store |
 | Adds four RS-232 serial ports to PCI Express enabled computer systems. Replaces part # JJ-E40011-S4 Note: Replaces part # JJ-E40011-S4 Easily adds four RS232 DB9 serial ports through an available PCI Express slot PCI Express 1-lane (x1) adapter works... more | $113.64 $96.99 FREE shipping go to store |
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