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Green PCI-E x1 card with two DB9 serial ports and low-profile bracket

TeKit

TeKit 2 Port Serial PCI-E 1.0 x1 Expansion Card

SKU CH-KVXG-1AJRX

Adds two RS-232 DB9 serial ports via a PCI-E 1.0 x1 slot using a WCH382L chip

  • External connectors2 x Serial Ports
  • Supported standardsPCI-E card 2 to serial COM port serial card DB9 RS232 serial
  • Product typeMini PCI Express to Serial Port
  • DetailsIO Crest 2 Port Serial PCI-e 1.0 × 1
  • Key featuresIO Crest 2 Port Serial PCI-e 1.0 × 1
  • Product weight60g
  • Adds two DB9 RS232 serial ports via a single PCI-E 1.0 x1 slot
  • WCH382L chip provides 256-byte FIFO buffers for reliable high-speed data transfer up to 250k/s
  • Supports full RS232 hardware flow control and all standard MODEM signals for legacy equipment
  • Compatible with Windows 98 through Windows 8 and Linux across 32-bit and 64-bit systems
  • Weighs 60g and fits any available PCI-Express slot for simple plug-and-play installation

Two serial ports for legacy and industrial gear

The TeKit expansion card adds two DB9 RS232 ports through a PCI‑Express 1.0 x1 slot using the WCH382L chip. It targets IPC builders, telecom integrators, medical equipment technicians and POS installers who still drive engraving machines, cutting plotters, access-control panels or serial printers from a modern motherboard.

Passive cooling keeps the slot silent

The 60 g board draws power only from the PCI‑Express bus and has no fan or heatsink, so it adds no audible noise inside a chassis. The 1.0 link runs at 2.5 Gb/s full duplex, and the 16C550‑compatible UARTs provide 256‑byte FIFOs that keep CPU interrupts low during normal RS232 traffic.

Sustained transfers hold at 250 kb/s per port

Each channel supports hardware flow control and data lengths of 5 to 8 bits, allowing continuous streams up to the rated 250 kb/s without overflow. Remote wake‑up and power‑management features let the host sleep between bursts, while driver support spans Windows 98 SE through Server 2012 plus Linux for long‑term deployments.

How it compares

Measured against everything we stock in PCIe Expansion Cards, at today’s prices. Recalculated every night.

Price $22.99
Cheaper than about 64% of the 891 comparable items (median $30.99).

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Specifications

Product
Brand nameTeKit
Model name2 Ports
Product typeMini PCI Express to Serial Port
Connectivity
Supported standardsPCI-E card 2 to serial COM port serial card DB9 RS232 serial communications expansion card
Ports & slots
External connectors2 x Serial Ports
Size & build
Product weight60g

Questions about this item

How is the PCI-E 1.0 x1 card seated, and which step is often missed?

Insert the card into an available PCI-Express slot, secure the bracket screw, then install the WCH382L driver for Windows or Linux before the ports appear.

What maintenance or replacement will the DB9 RS232 ports need over time?

The DB9 connectors and RS232 level shifters are solid-state; only the slot retention screw or a loose cable may need occasional re-tightening.

What limit appears first when both COM ports run at 250k b/s continuously?

The PCI-E 1.0 x1 link caps total throughput at 2.5 Gb/s, so sustained dual-port traffic stays well within the 256-byte FIFO buffer capacity.

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