Does it support enough bandwidth to utilize the front panel USB 3.0 connection as well as the rear connection simultaneously?

All I can tell you is that it is the NEC chipset and you must use the drivers from the website even if you have Windows 10 and it puts its own drivers in. The drivers contain a configuration tool where you can turn off power savings mode. I have had problems with power savings on.

Can this addon card help if I'm running out of USB ports?

Yes, this addon card provides additional USB 3.0 ports, including 2 external and 2 internal ports.

Is at least 1 of the 2 INTERNAL connections a 19 pin female motherboard type that can be connected to a pair of front USB case terminal?

Yes, one of the plugs is for power to the unit, the other is a standard USB 3.0 header, it works with both my 3.0 front plugs.

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StarTech.com PEXUSB3S2EI 4-port PCI Express USB 3.0 card - 2 external, 2 internal - SATA power

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Add front or rear panel USB 3.0 ports to your computer case using USB 3.0 motherboard-style headers
4 Port PCIe USB 3.0 Card
2 External & 2 Internal
SATA Power
UASP Support
USB 3.0 Adapter Card with 2x Int Motherboard-Style Headers
Native OS Support in Windows 8 and 8.1 and Linux kernel 2.6.31 or later for easy driver installation
Flexibility to connect external and internal USB 3.0 devices

Overview

Specs

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Add front or rear panel USB 3.0 ports to your computer case using USB 3.0 mother

Model
Brand	StarTech.com
Model	PEXUSB3S2EI

Details
Type	PCI to 1394 / USB Card
External USB Ports	2-port USB 3.0
Internal USB Ports	2x USB Ports
External Ports	2 - USB 3.0 A (9 pin; SuperSpeed) Female
Internal Ports	1 - SATA Power (15 pin) Plug 2 - IDC (20 pin; USB 3.0; Motherboard Header) Receptacle
Standard	USB 3.0
Data Transfer Rate	Up to 5.0 Gbps
Operating Systems Supported	Windows® 8 / 8.1 (32/64bit), 7 (32/64), Vista (32/64), XP (32/64) Windows Server® 2012, 2008 R2 Linux 2.6.31 and up (Tested up to 3.5)
Specifications	Bus Type: PCI Express Card Type: Standard Profile (LP bracket incl.) Chipset ID: Renesas / NEC - µPD720201 Industry Standards: USB 3.0 Specification Rev. 1.0 PCI Express Base Specification Rev. 2.0 Intel xHCI Specification Rev. 1.0 Interface: USB 3.0 Port Style: Integrated on Card Ports: 4 Maximum Cable Length: 9.8 ft [3 m] Maximum Data Transfer Rate: 5 Gbps MTBF: 1,920,042 Hours Type and Rate: USB 3.0 - 5 Gbit/s UASP Support: Yes

Features
Features	Add front or rear panel USB 3.0 ports to your computer case using USB 3.0 motherboard-style headers 4 Port PCIe USB 3.0 Card 2 External & 2 Internal SATA Power UASP Support USB 3.0 Adapter Card with 2x Int Motherboard-Style Headers Native OS Support in Windows 8 and 8.1 and Linux kernel 2.6.31 or later for easy driver installation Flexibility to connect external and internal USB 3.0 devices

Dimensions & Weight
Dimensions	4.70" x 0.70" x 3.60"
Weight	0.12 lb.

Packaging
Package Contents	1 - 4 Port PCI Express USB 3.0 Card - 2 Ext 2 Int 1 - Low-Profile Bracket 1 - Driver CD 1 - Instruction Manual

Additional Information
First Listed on Newegg	January 19, 2026

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Item#: 9SIBSWCKS02705

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StarTech.com PEXUSB3S2EI 4-port PCI Express USB 3.0 card - 2 external, 2 internal - SATA power

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