Plus, with a built-in SATA power connector, each USB port can provide up to 900mA of power to devices that draw power from a host bus connection (500mA for USB 2.0) by connecting to your computer power supply. This 4-port PCIe USB 3.0 adapter enables all four USB 3.0 ports to be external facing, while still allowing the card to fit into a small form factor/low profile computer system. Using a "stacked" port layout that places the ports one on top of the other, more ports are able to fit into a smaller space. SuperSpeed USB 3.0 provides up to 5 Gbps of data bandwidth, while remaining backward compatible with existing USB 2.0 devices at 480Mbps.
![usb 3.0 pci express card 4 port usb 3.0 pci express card 4 port](https://img.joomcdn.net/744609056358e6a1fa6a3609ad4ec80ce4cc4127_original.jpeg)
The PEXUSB3S4V PCI Express USB 3.0 Card (with SATA Power) adds 4 external USB 3.0 ports to any PCI Express-enabled computer system.
![usb 3.0 pci express card 4 port usb 3.0 pci express card 4 port](https://c1.neweggimages.com/ProductImage/12-400-546-02.jpg)
![usb 3.0 pci express card 4 port usb 3.0 pci express card 4 port](https://www.orico.cc/uploads/product/PME-4U/2.jpg)
Add 4 external USB 3.0 ports to a low profile or standard computer, through PCI Express.