USB 3.1 PCIE Card - 5 Port - 1x USB-C - 2x USB-A - 1x 2 Port IDC - Internal USB Header Expansion - USB C PCIe Card (PEXUSB312EIC): .uk: Computers & AccessoriesĭeLOCK USB 3.0 Slot Bracket: .uk: Computers & AccessoriesĪkasa AK-CBUB17-40BK USB 3.0 Internal Adapter Cable: .I'm trying to get USB 3.0 running through the PCIe slot.

you can buy a bracket with 2 usb 3.0 ports for a few dollars and connect it to the header to get a total of 4 usb 3.0 ports on the back: If you want something better, you have this one with 1 usb type c 10g + 2 usb 3.0 + one header with 2 usb 3.0 ports.

If you want something cheap and good, I'd suggest this one which doesn't require additional power, it uses the power from the pci-e slot : ORICO 4-Port USB 3.0 PCI Express (PCIe) Expansion Card Adapter for Windows Server, Vista, XP, 7, 8, 8.1, 10 - PCI-E on-board Powered with NO Need for SATA/Molex Power Connector: .uk: Computers & Accessories So, for these reasons, most cards will have a sata or molex connector to just take 5v and 12v directly from the power supply instead of using the power provided by the pci-e slot. The pci-e slot doesn't have 5v in it, so there must be a dc-dc converter on the card to convert 12v to 5v, or the card must have a connector to take in 5v from the power supply.Įven so, a dc-dc converter is not 100% efficient, it would be maybe 90% or higher, so you're getting very close to that 25w limit just by producing that power for the usb ports. Įach usb port is supposed to provide up to 5v at 0.9A or 4.5 watts, so if you have four usb ports on the card your card must be able to provide at least 4 ports x 4.5 watts = 18 watts. Pci-e x1 and pci-e x4 cards are allowed to take up to 10 watts or 25 watts from the pci-e slot.

Pcie slot powered usb 3 card