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IO Crest SI-MPE15046 2 Port Serial DB9 Mini PCIe Expansion Card RS-232 6650 UART XR17V352
IO CREST

IO Crest SI-MPE15046 2 Port Serial DB9 Mini PCIe Expansion Card RS-232 6650 UART XR17V352

Bottom line: The IO Crest SI-MPE15046 2 Port Serial DB9 Mini PCIe Expansion Card is a specs-and-price decision rather than a crowd-consensus one in the expansion cards category. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.

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Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

Pros & Cons

Pros

  • ✓ Multi-port RS-232 card
  • ✓ Backed by IO CREST'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

This 2 port Mini PCI-Express serial card turns any Mini PCI-E slot into two RS232(DB9) serial ports. Use this quick solution to add legacy serial support for embedded systems. Take full advantage of PCI-E capability by providing speed and reliability while reducing load to the system. Useful for point-of-sale systems, remote access servers, and more.

SpecPicks Verdict

SpecPicks scored IO Crest SI-MPE15046 2 Port Serial DB9 Mini PCIe Expansion Card… using a rating × review-volume × price-fit model applied to published specs and reviews across the expansion cards category. IO CREST'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

  • Multi-port RS-232 card
  • Automatic RTS/CTS or DTR/DSR hardware flow control with programmable hysteresis
  • Automatic Xon/Xoff software flow control
  • RS-232 half duplex direction control output with programmable turn-around delay

Full Specifications

BrandIO CREST
Style2 Port Serial
Style Name2 Port Serial
Model NumberSI-MPE15046
Built-In Media2 Serial Ports Pci-E Controller Card, 2X Single Port Low Profile Brackets, Driver Mini Cd, Full Bracket For 2 Com Ports, User Manual
Item Type Name2 Port Serial DB9 Mini PCIe Controller Card (RS-232)
Mfr Part NumberSI-MPE15046
Number of Items1
Hardware InterfacePCI
Warranty Description3 Year Warranty
Global Trade Identification Number00810154018017

Ready to buy?

IO Crest SI-MPE15046 2 Port Serial DB9 Mini PCIe Expansion Card RS-232 6650 UART XR17V352 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.

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