Skip to main content
StarTech 4-Port USB 3.0 PCI Express Card Adapter, 5Gbps (PEXUSB3S42V)
StarTech.com

StarTech 4-Port USB 3.0 PCI Express Card Adapter, 5Gbps (PEXUSB3S42V)

Bottom line: The StarTech.com StarTech 4-Port USB 3.0 PCI Express Card Adapter 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

  • ✓ ENHANCED WITH UASP SUPPORT: The USB 3.0 PCI express card adapter uses UASP technology
  • ✓ 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

Add four USB 3.0 ports with two independent channels, LP/SATA power, and charging support to your PC through a PCI Express slot. The PEXUSB3S42V 4-port PCI Express USB 3.0 card lets you add four USB 3.0 ports with two dedicated 5 Gbps channels to your PCIe x4-enabled PC. This independent port architecture improves USB 3.0 performance by transferring data on two individual channels to your computer, giving you faster file transfers. When multiple devices are connected, traditional single bus USB 3.0 cards share your maximum bandwidth between all ports. By employing a second host controller…

Related Products

Other products in this category you may like:

SpecPicks Verdict

SpecPicks scored StarTech.com StarTech 4-Port USB 3.0 PCI Express Card Adapter 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

  • INCREASED PRODUCTIVITY: The USB 3.0 expansion card adds four USB 3.0 ports with two dedicated 5 Gbps channels to your system. This independent port architecture improves USB 3.0 performance.
  • ENHANCED WITH UASP SUPPORT: The USB 3.0 PCI express card adapter uses UASP technology
  • UASP technology optimizes transfers by allowing multiple commands to be processed simultaneously.
  • ADDED POWER CAPABILITIES: For high-power devices, this 4-port USB 3.0 PCIe card includes an optional SATA or LP4 power connector to deliver up to 900mA per port to USB 3.0 bus-powered devices.
  • MAXIMUM COMPATIBILITY: The USB 3.0 PCIe card adapter supports USB Battery Charging Specification 1.2 (Apple Mode only). It is also backward compatible with existing USB 2.0 / 1.1 devices.

Full Specifications

BrandStarTech.com
StylePCI Express
Style NamePCI Express
Unit Count1 Count
ConnectivityUSB
Model NumberPEXUSB3S42V
Built-In MediaLow-profile bracket, USB adapter
Mfr Part NumberPEXUSB3S42V
Number of Items1
Compatible DevicesPersonal Computer
Hardware InterfacePCI
Warranty Description2 year warranty
Item Dimensions L x W x H8.27"L x 5.51"W x 1.5"H
ENHANCED WITH UASP SUPPORTThe USB 3.0 PCI express card adapter uses UASP technology
Global Trade Identification Number00065030854597, 00132018237359

Ready to buy?

StarTech 4-Port USB 3.0 PCI Express Card Adapter, 5Gbps (PEXUSB3S42V) 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 →
StarTech 4-Port USB 3.0 PCI Express Card Adapter, 5Gbps (PEXUSB3S42V)
View on Amazon →