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Low-profile PCIe card with two DB44 breakout cables each splitting into four DB9 ports

STARTECH

STARTECH PEX8S1050LP 8-Port PCIe Serial Expansion Card

SKU CH-X8KX-P4KMT MPN PEX8S1050LP

Adds eight RS-232 DB9 serial ports via two PCIe slots with 16C1050 UART and 921.4Kbps transfer rates

  • TypePCI Express to Serial Port Card
  • External Ports8 x DB-9 (9 pin, D-Sub) Male
  • Internal Ports1 x PCI Express x1 Male
  • Operating Systems SupportedWindows CE 5.0, 98SE, 2000, XP, Vista, 7, 8, 8.1, 10 Windows
  • SpecificationsBus Type: PCI Express Card Type: Low Profile (SP bracket inc
  • FeaturesAdd eight RS-232 DB9 connections to your desktop computer, t
  • Add eight RS-232 DB9 serial ports via two PCIe slots
  • 16C1050 UART enables data rates up to 921.4Kbps
  • 256-byte FIFO buffers per transmitter and receiver
  • Low-profile bracket installed, two full-profile brackets included
  • Broad OS support across Windows and Linux platforms

Eight RS-232 Ports Over Two PCIe Slots

This PCI Express card adds eight DB9 serial ports to a desktop through two x1 slots using included DB44 breakout cables. It targets technicians and integrators who need legacy RS-232 connectivity for industrial gear, point-of-sale hardware or older peripherals. The board ships with a low-profile bracket installed and two full-profile brackets in the box.

921.4 Kbps 16C1050 UART With 256-Byte FIFO

The ASM1083 and SB16C1058PCI chipset combination delivers up to 921.4 Kbps per port with 256-byte transmit and receive FIFOs. Data-bit settings of 5, 6, 7 or 8 are supported. This specification decides whether the card matches the timing and buffering requirements of your serial equipment.

Fits Low-Profile And Standard Cases

A pre-fitted low-profile bracket lets the card install in small-form-factor chassis, while the two supplied full-profile brackets cover standard ATX builds. Two PCIe x1 slots are required. Driver support spans Windows 98SE through Windows 10, Windows Server 2003 through 2019 and Linux kernels 2.4.x to 4.11.x LTS.

Highlights

  • Add eight RS-232 DB9 serial ports via two PCIe slots
  • 16C1050 UART enables data rates up to 921.4Kbps
  • 256-byte FIFO buffers per transmitter and receiver
  • Low-profile bracket installed, two full-profile brackets included
  • Broad OS support across Windows and Linux platforms

Specifications

BrandStarTech.com
ModelPEX8S1050LP
TypePCI Express to Serial Port Card
External Ports8 x DB-9 (9 pin, D-Sub) Male
Internal Ports1 x PCI Express x1 Male
Operating Systems SupportedWindows CE 5.0, 98SE, 2000, XP, Vista, 7, 8, 8.1, 10
Windows Server 2003, 2008 R2, 2012, 2016, 2019
Linux 2.4.x to 4.11.x LTS Versions only
SpecificationsBus Type: PCI Express
Card Type: Low Profile (SP bracket incl.)
Chipset ID: ASMEDIA - ASM1083, SYSTEMBASE - SB16C1058PCI
Interface: Serial
Port Style: Dongle (Included)
Ports: 8
Data Bits: 5, 6, 7, 8
FIFO: 256 Bytes
Flow Control: RTS/CTS, XON/XOFF
Max Baud Rate: 921.6 Kbps
Parity: None, Even, Odd, 1, 0
Serial Protocol: RS-232
Stop Bits: 1, 1.5, 2
FeaturesAdd eight RS-232 DB9 connections to your desktop computer, through two PCIe expansion card slots
16C1050 UART
High-speed data transfer rates of up to 921.4Kbps
Versatile use with mounting brackets for low profile and standard cases
Supports 256-byte FIFO per transmitter and receiver
Dimensions0.87" x 2.36" x 5.70"
Weight0.26 lbs.
Package Contents1 x PCIe Serial Card
2 x DB44 to 4-Port SB9 Breakout Cables
2 x Full Profile Brackets
1 x Quick-Start Guide
Shipping weight1.36 kg
Package size292 × 191 × 69 mm

Questions about this item

What does the 921.4Kbps headline speed mean once the card is installed in a real machine?

Each of the eight DB9 ports can transmit and receive at up to 921.4Kbps, limited by the 16C1050 UART and 256-byte FIFO on the card.

What interface does the card use and what does it cap in practice?

The card plugs into a PCI Express x1 slot; the slot provides more bandwidth than the eight serial ports can use, so the UART remains the practical limit.

What does the card physically need to fit or mount in my case?

It ships with a low-profile bracket installed and includes two full-profile brackets; the board measures 0.87 by 2.36 by 5.70 inches and uses two adjacent expansion slots for the breakout cables.

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