What is the "dual-port internal connector"? I have an old Silverstone adapter that gives 2 front panel USB-3 connectors via cable but I need at least one on the back panel. It appears the output connectors on this board are SATA, like for a hard drive.

The 'dual-port internal connector' in the Silverstone Tek PCI Express Card with Two USB 3.0 External Ports is designed to add additional USB 3.0 ports to your system. It provides one dual port internal connector, which means it can support two USB 3.0 ports internally. This can be used for connecting front panel USB 3.0 ports or other internal USB devices.

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Silverstone Tek PCI Express Card with Two USB 3.0 External Ports and Internal 19-Pin Dual Port Connector (EC04-E)

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USB 3.0 with two external standard Type-A ports and one dual port internal connector
PCI Express 2.0 with single lane (x1) throughput 5Gbit/s
Supports simultaneous operation of multiple USB 3.0/2.0/1.1 devices
Adds four total USB 3.0 ports to your system
Built-in power connector to receive extra power from system power supply

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Silverstone Tek PCI Express Card with Two USB 3.0 External Ports and Internal 19-Pin Dual Port Connector (EC04-E)

Item Condition: New

Brand: silverstone technology
Item model number: EC04-E

Product Information

- USB 3.0 with two external standard Type-A ports and one dual port internal connector
- PCI Express 2.0 with single lane (x1) throughput 5Gbit/s
- Supports simultaneous operation of multiple USB 3.0 / 2.0 / 1.1 devices
- Adds four total USB 3.0 ports to your system
- Built-in power connector to receive extra power from system power supply

SilverStone created an excellent extension card product, the EC04-E, which connects to the motherboard via single lane PCI Express 2.0 to support two external and a dual port USB 3.0 connector for maximum compatibility and flexibility. This card is a great add-on for systems that require connections to multiple USB 3.0 devices such as SilverStones own USB 3.0 enclosures RVS02 and TS07.

Additional Information
First Listed on Newegg	February 13, 2022

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Item#: 9SIB7VEH000153