HP
HP OEM PCI Serial Parallel I/O Card DB9 RS-232 + DB25 IEEE 1284 SP# 321722-001
*Price sourced from Amazon.com. Last updated 2026-05-12. Price and availability subject to change.
PCI serial/parallel I/O expansion card intended for legacy systems requiring RS-232 serial and IEEE 1284 parallel connectivity. Standards: RS-232 / IEEE 1284. PCI expansion card (exact item shown). Interface: 32-bit PCI.
SpecPicks Verdict
SpecPicks classifies HP OEM PCI Serial Parallel I/O Card DB9 RS-232 + DB25 IEEE 1284 SP# 3… as a niche pick — read recent reviews before buying in the expansion cards category, based on limited Amazon review volume so far and our ranking model that weights rating × review-volume × price-fit. HP'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
- ✓ Backed by HP'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
Full Specifications
| oem | true |
|---|---|
| serial_ports | 1 |
| parallel_ports | 1 |
| serial_standard | RS-232 |
| serial_connector | DB9 |
| parallel_standard | IEEE 1284 |
| parallel_connector | DB25 |
Ready to buy?
HP OEM PCI Serial Parallel I/O Card DB9 RS-232 + DB25 IEEE 1284 SP# 321722-001 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 2026-05-12. Price and availability subject to change.
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