Skip to main content
SIIG Legacy and Beyond Series PCIe to USB 3.0 2 (External) Ports PCI Express Card with 19Pin Header, Data Transfer Rates Up to 5Gbps, Supports UASP | Add 2 USB ports to a PCIe desktop at 5Gbps; UASP supports storage and high-speed peripherals.
SIIG

SIIG Legacy and Beyond Series PCIe to USB 3.0 2 (External) Ports PCI Express Card

Bottom line: The SIIG Legacy and Beyond Series PCIe to USB 3.0 2 Ports PCI Express 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.

Check price on Amazon

As an Amazon Associate, SpecPicks earns from qualifying purchases. Full disclosure →

Check price on Amazon → Compare to similar expansion cards

By , Founder & Editor-in-Chief · Listing data updated

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

  • ✓ Backed by SIIG'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

SIIG’s USB 3.0 4-Port (2-Ext plus 19-pin header) PCIe Host Cardallows you to add four SuperSpeed USB 3.0 ports (two external and 2 internal via 19-pin header) to your desktop computer through a PCI Express slot to enable additional device connections. It supports 5Gb/s ultra-fast USB 3.0 data transfer rate and provides up to 900mA power output per port with over-current protection to ensure smooth and reliable data transmission. This is a great USB port expansion solution to enhance your system’s USB connectivity performance for maximum productivity.Requirements:-Desktop PC with one…

Related Products

Other products in this category you may like:

SpecPicks Verdict

SpecPicks scored SIIG Legacy and Beyond Series PCIe to USB 3.0 2 Ports PCI Express Card using a rating × review-volume × price-fit model applied to published specs and reviews across the expansion cards category. SIIG'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

  • Quickly adds two external USB 3.0 ports and 2 USB 3.0 ports via internal 19-pin USB header through an available PCI Express slot for connecting a variety of external USB devices
  • Supports SuperSpeed USB 3.0 data transfer rates up to 5Gbps providing fast and smooth data transmission; Please note that the actual transmission speed is limited by the setting of the device connected.
  • Supports UASP (USB Attached SCSI Protocol) and increases data transfer speed with external storage devices especially for SSDs
  • Each port provides power output up to 900mA and features Over-Current protection to further protect your connected devices; EXTERNAL POWER CONNECTOR (Molex) NEEDED.
  • Built-in 19-pin header allows expanding to another two USB 3.0 ports; Installs into standard height or low profile system chassis with the included brackets
  • At SIIG, we are proud of our products and service. Our products are of high quality and built to last. Contact us thru Amazon if any issues arise.

Full Specifications

BrandSIIG
Style4-Port (19-Pin)
Style Name4-Port (19-Pin)
ConnectivityUSB
Model NumberLB-US0214-S1
Mfr Part NumberLB-US0214-S1
Hardware InterfacePCI, SCSI, USB 3.0
Full listing titleSIIG Legacy and Beyond Series PCIe to USB 3.0 2 (External) Ports PCI Express Card with 19Pin Header, Data Transfer Rates Up to 5Gbps, Supports UASP | Add 2 USB ports to a PCIe desktop at 5Gbps; UASP supports storage and high-speed peripherals.

Ready to buy?

SIIG Legacy and Beyond Series PCIe to USB 3.0 2 (External) Ports PCI Express Card with 19Pin Header, Data Transfer Rates Up to 5Gbps, Supports UASP | Add 2 USB ports to a PCIe desktop at 5Gbps; UASP supports storage and high-speed peripherals. 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.

Check price on Amazon →

Related Expansion Cards

Keep exploring SpecPicks

Other buying guides

Browse the catalog

Editorial

More guides & deep dives from the SpecPicks archive

Browse all articles & guides →

More reviews from the SpecPicks archive

Browse all reviews →

Earliest SpecPicks reviews

Browse full archive →
SIIG Legacy and Beyond Series PCIe to USB 3.0 2 (External) Ports PCI Express Card with 19Pin Header, Data Transfer Rates Up to 5Gbps, Supports UASP | Add 2 USB ports to a PCIe desktop at 5Gbps; UASP supports storage and high-speed peripherals.
View on Amazon →