IO CREST
2-Port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller to Dual Serial DB9 Ports with Low Profile Bracket
*Price sourced from Amazon.com. Last updated 2026-05-24. Price and availability subject to change.
Add 2 RS-232 DB9 serial ports to your full height or low profile computer through a PCI Express X1 slot with IOCrest SI-PEX15037 PCI-Express X2 serial controller card. The RS232 serial adapter card is compatible with a broad range of operating systems, including Windows and Linux (kernel 2.6.11 and up). plus, the adapter card includes an optional half-height/low profile bracket that allows the card to be installed in virtually any computer case.
SpecPicks Verdict
SpecPicks classifies 2-Port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial… as a solid pick with broad community endorsement in the expansion cards category, based on 160 verified Amazon reviews and our ranking model that weights rating × review-volume × price-fit. IO CREST's positioning sits within the broader category mid-tier. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.
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 Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.
Pros & Cons
Pros
- ✓ Solid 4.3★ customer rating
- ✓ Fully compliant with PCI-E base Specification, Revision 1.0A
- ✓ Backed by IO CREST's warranty and support channels
- ✓ Ships via Amazon with Prime eligibility and the standard returns policy
Cons
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified
Key Features
- Fully compliant with PCI-E base Specification, Revision 1.0A
- Support for D1, D2, D3hot and D3cold
- Utilizes 100-MHz Differential PCI-E common reference Clock
- 2 16C450/550/extended 550 compatible UART
- Bi-directional speeds from 50bps to 16Mbps/port
- Fully Compliant with PCI-e Base Specification, Revision 1.0a
Full Specifications
| Brand | IO CREST |
|---|---|
| Style | Double Serial DB9 Port PCIe x1 |
| Style Name | Double Serial DB9 Port PCIe x1 |
| Unit Count | 2.0 Count |
| Model Number | SI-PEX15037 |
| Built-In Media | 2 Serial Ports Pci-E Controller Card^2X Single Port Low Profile Brackets^Full Bracket For 2 Com Ports^User Manual^Driver Mini Cd |
| Mfr Part Number | SI-PEX15037 |
| Operating System | Linux |
| Compatible Devices | Desktop |
| Hardware Interface | Serial Interface |
| Warranty Description | 3 Year Warranty |
Ready to buy?
2-Port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller to Dual Serial DB9 Ports with Low Profile Bracket is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-05-24. Price and availability subject to change.
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