How many controllers does this pcie card have?

on windows 10, it shows up as a single "VIA USB 3.0 eXtensible Host Controller - 1.0 (Microsoft)" in the device manager and "pci\ven_1106&dev3483..." in system information. I assume the vl805 chip is sitting on the pcie bus and the vl813 chip is connected to one port on the vl805.

Where do I download the drivers from?

Tiergrade usb expansion card is plug and play on Windows 10. Windows 7 requires drivers, you can use the enclosed driver CD or download it from the following link: https://www.via-labs.com/driver.php

What is the purpose of having two USB ports inside the computer?

Just for convenience and 2 extra USB 3.0 ports for you if you need more USB 3.0 port Put 2 USB 3.0 in the front so you don't have to go to the back of computer ... But ... You have to add some panel for these 2 USB 3.0 ports or ... you can run 2 wires hang out to the front too .... your choice ..!!! . .

Can you boot from a bootable usb drive plugged into this card? or will it not be recognized bu bios until o/s drivers are loaded?

Yes you can use this with bootable USB. This is the reason why I bought this particular card: to install 2 USB sticks internally for enhanced UEFI capability.

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Tiergrade Superspeed 7 Ports PCI-E to USB 3.0 Expansion Card with 15-Pin SATA Power Connector - PCI Express(PCIe) Expansion Card USB Card for Desktop PC Support Windows 10/8.1/8/7/XP

Tiergrade Superspeed 7 Ports PCI-E to USB 3.0 Expansion Card with 15-Pin SATA Power Connector - PCI Express(PCIe) Expansion Card USB Card for Desktop PC Support Windows 10/8.1/8/7/XP

Product ID: 163865032

Details

Brand
Tiergrade
Hardware Interface
PCI Express x4
Item Weight
2.4 Ounces
Product Dimensions
4.76"L x 2.8"W
Style
Classic

⚡Up to 5 Gbps SuperSpeed data transfer

🔋Stable 15-pin SATA power supply for reliable performance

🔌7 USB 3.0 ports for massive device expansion

Description

🚀 Supercharge your desktop with 7x USB 3.0 ports—because one port is never enough!

BLAZING FAST TRANSFERS - Experience lightning-quick data speeds up to 5 Gbps—perfect for HD media and large files.
EXPAND YOUR CONNECTIVITY - Seamlessly add 7 external USB 3.0 ports to your desktop for all your peripherals and gadgets.
PLUG PLAY COMPATIBILITY - Effortlessly supports Windows 10/8.1/8/7/XP and is backward compatible with USB 2.0/1.x devices.
ROCK SOLID POWER DELIVERY - Equipped with a dedicated SATA power connector ensuring stable and consistent power to all ports.
COMPACT EFFICIENT DESIGN - Slim profile fits snugly in PCIe x1 slots without blocking adjacent cards—ideal for multitasking pros.

The Tiergrade Superspeed 7 Ports PCI-E USB 3.0 Expansion Card transforms your desktop by adding seven high-speed USB 3.0 ports with data transfer rates up to 5 Gbps. Powered via a 15-pin SATA connector, it ensures stable power delivery for connected devices. Compatible with a wide range of Windows operating systems and backward compatible with USB 2.0/1.x, this compact PCIe x1 card is perfect for professionals needing expanded connectivity without sacrificing speed or reliability.

Specifications

ASIN	B07Z34BJYH
Best Sellers Rank	#241 in Internal USB Port Cards
Brand	Tiergrade
Compatible Devices	Personal Computer
Customer Reviews	4.2 4.2 out of 5 stars (760)
Hardware Interface	PCI Express x4
Item Dimensions L x W x H	4.76"L x 2.8"W x 0.71"H
Item Weight	2.4 Ounces
Manufacturer	Tiergrade
Mfr Part Number	TG-HB017
Model Number	TG-HB017
Operating System	Windows
Style Name	Classic
UPC	778716324252
Unit Count	7.0 Count
Warranty Description	12 months

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