Will this USB expansion card work with my HP Pro 4300 PC?

Yes, this USB expansion card is compatible with the HP Pro 4300.

Is this expansion card backward compatible with older USB versions?

Yes, this expansion card is backward compatible with USB 2.0 and USB 1.0/1.1 devices.

How fast is the data transfer rate of this USB 3.0 expansion card?

The data transfer rate of this USB 3.0 expansion card is up to 5Gbps per port, with a total of up to 20Gbps.

Do I need to power down my system to connect or disconnect devices?

No, the product features a hot-swap capability, allowing you to connect or disconnect devices without powering down the system.

Can I charge my Apple devices using this expansion card?

Yes, this expansion card supports USB Battery Charging Specification 1.2 for Apple Mode device charging.

Does this use USB headers on the motherboard?

No, this product does not use USB headers on the motherboard. It uses a PCI Express slot and has a PCI Express x4 Male connector.

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StarTech PEXUSB3S42V 4 Port Dual Bus PCI Express (PCIe) SuperSpeed USB 3.0 Card Adapter with UASP - SATA/LP4 Power

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External USB Ports: 4 Ext Dual Bus

4 Ext
4 Ext Dual Bus
4 Ext Quad Bus

Add four USB 3.0 ports with two independent channels LP/SATA power and charging support to your PC through a PCI Express slot
Compatible with HP Pro 4300 / Dell OptiPlex 3010
4 Port PCIe USB 3.0 Card w/ 2 Dedicated 5Gbps Channels / USB 3.0 UASP Card
USB 3.0 Controller
USB 3.0 Expansion Card with UASP / SATA Powered USB 3.0 Adapter Card w/ 2 channels and up to 5 Gbps of bandwidth per channel
USB 3.0 PCIe Card with USB Battery Charging Specification 1.2 (Apple Mode device charging only)

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Add four USB 3.0 ports with four independent channels, LP/SATA power, and chargi

Model
Brand	StarTech.com
Model	PEXUSB3S42V

Details
Type	PCI Express
Specifications	Industry Standards: - USB 3.0 Specification Rev. 1.0 - USB Battery Charging Specification Rev. 1.2 (Apple Mode only) - PCI Express Base Specification Rev. 2.0 - Intel xHCI Specification Rev. 1.0 Interface: USB 3.0 Connector Type(s): 1 - PCI Express x4 Male External Ports: 4 - USB 3.0 A (9 pin; SuperSpeed) Female Internal Ports: - 1 - LP4 (4 pin; Molex Large Drive Power) Female - 1 - SATA Power (15 pin) Plug Maximum Cable Length: 9.8 ft [3 m] Maximum Data Transfer Rate: 5Gbps per 2 ports - 10Gbps Total Type and Rate: USB 3.0 - 5 Gbit/s UASP Support: Yes

Features
Features	Add 4 SuperSpeed USB 3.0 ports with Quad Bus architecture (5Gbps per port) to your PCI Express-enabled PC Provides four external, quad bus USB 3.0 Ports Supports up to 20 Gbps total transfer bandwidth - Up to 5 Gbps per port UASP support across all four ports PCIe x4 interface compliant with PCI Express 2.0 specifications Optional LP4 or SATA power connector provides up to 900mA per USB port Supports USB Battery Charging Specification 1.2 (Apple Mode only) Fully compliant with USB 3.0 rev 1.0 and Intel xHCI rev 1.0 specifications Backward compatible with USB 2.0 and USB 1.0/1.1 devices Includes a Low Profile/half-height installation bracket Hot-swap feature to connect/disconnect devices without powering down the system Add four USB 3.0 ports with two independent channels LP/SATA power and charging support to your PC through a PCI Express slot Compatible with HP Pro 4300 / Dell OptiPlex 3010 4 Port PCIe USB 3.0 Card w/ 2 Dedicated 5Gbps Channels / USB 3.0 UASP Card USB 3.0 Controller USB 3.0 Expansion Card with UASP / SATA Powered USB 3.0 Adapter Card w/ 2 channels and up to 5 Gbps of bandwidth per channel USB 3.0 PCIe Card with USB Battery Charging Specification 1.2 (Apple Mode device charging only)

Dimensions & Weight
Dimensions	0.59" x 2.17" x 6.57" (W x H x L)
Weight	0.13lb

Additional Information
First Listed on Newegg	February 06, 2026

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StarTech PEXUSB3S42V 4 Port Dual Bus PCI Express (PCIe) SuperSpeed USB 3.0 Card Adapter with UASP - SATA/LP4 Power

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Item#: 9SIA6ZPKSH1586

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StarTech PEXUSB3S42V 4 Port Dual Bus PCI Express (PCIe) SuperSpeed USB 3.0 Card Adapter with UASP - SATA/LP4 Power

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