StarTech.com
StarTech 2-Port PCI Express Serial Interface Card (21050-PC-SERIAL-CARD)
Bottom line: The StarTech.com StarTech 2-Port PCI Express Serial Interface Card is a specs-and-price decision rather than a crowd-consensus one in the expansion cards category, priced around $52.91 on Amazon as of 2026-10-06. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.
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*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
Pros & Cons
Pros
- ✓ Backed by StarTech.com's warranty and support channels
Cons
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, shipping and returns are set by the retailer and may have changed since this page was last updated
Manufacturer description
2-PORT PCI EXPRESS SERIAL CARD, DUAL PORT PCIE TO RS232 (DB9) SERIAL CARD, 16C10
SpecPicks Verdict
SpecPicks scored StarTech.com StarTech 2-Port PCI Express Serial Interface Card using a rating × review-volume × price-fit model applied to published specs and reviews across the expansion cards category. StarTech.com's expansion cards lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for expansion cards of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Key Features
- PCIE TO SERIAL: Connect serial RS232 (DB9) devices to a computer with this PC serial card. Features support for high performance 16C1050 UART on both DB9 male ports. Monitor activity with the built-in LED status lights on the PCI express DB9 card
- DEVICE COMPATIBILITY: Use this serial interface card to connect barcode readers/scanners, receipt printers, scales, PLCs, medical devices, etc. The UART PCIe card supplies 5V or 12V power over pin 9. Low-profile brackets are included
- APPLICATIONS: This card is ideal for IT applications such as server rooms, industrial control/automation, logistics, and laboratories. Continue using legacy hardware with this RS232 PCIe card. DB9 ports accept screw locking serial cables
- DUAL SERIAL PORT CARD SPECS: 16C1050 UART | Max Baud 921.6 Kbps per Port | 256 Byte FIFO | COM Retention | Supports Windows and Linux | Asix AX99100 Chipset | Odd/Even/Mark/Space/None Parity Modes | 5/6/7/8/9 Data Bits | PCIe 2.0 x1 | Low-profile Brackets
Full Specifications
| Brand | StarTech.com |
|---|---|
| Style | ASIX |
| Style Name | ASIX |
| Unit Count | 1.0 Count |
| Model Number | 21050-PC-SERIAL-CARD |
| Compatibility | PC, Linux |
| Mfr Part Number | 21050-PC-SERIAL-CARD |
| Compatible Devices | RS232 devices (barcode readers/scanners, receipt printers, scales, PLCs, medical devices, etc.) |
| Hardware Interface | Serial Interface |
| Warranty Description | 2-Year |
| Item Dimensions L x W x H | 0.7"L x 2.9"W x 4.7"H |
| Global Trade Identification Number | 00065030894760 |
| EU Spare Part Availability Duration | 2 Years |
Ready to buy?
StarTech 2-Port PCI Express Serial Interface Card (21050-PC-SERIAL-CARD) is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
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