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USB 3.0+eSATA/USB 2.0+9 Pin to PCI-e express 1X adapter | eBay
Originally from here:
http://www.pc-adapter.net/
That was my point, not that I expressed it directly. yowanvista seems to want to get USB3 through a USB2 connection. I thought that might not be possible, but I wasn't prepared to do the checking to verify that. (USB3 sockets are supposed to be backwards compatible with USB2 devices, but I assumed that the extra conductors weren't all grounds.)
USB 3 jack has the same connectors as USB 2 but the jack has additional connects for USB 3. Two different interfaces in the same cable. Pins 1-4 on a USB 3 plug is for USB 2 and is the same on a USB 2 plug.
As far as I know the only internal USB 3 plug on a motherboard is the 19 pin for two ports. It is the only one I am aware of that meets USB 3.0 specs.
Maximum PC | USB 3.0 Internal Connector Cable Spec Released!
Jim