While researching how to use my new motherboard with a 20pin USB3 header with my USB2 cables (so i wouldn't have to wait for yet another delivery), the farther i could go was this image
if i understand this correctly, the 20pin header has for each USB3 port:
- TX (D+ in pic)
- RX (D- in pic)
- GND x2
plus a shared ID pin.
the older USB2 header, had for each port:
the USB2 maps 1:1 to the final usb port... but the USB3 for me is just crazy! and I really doubt if I crack open a chinese USB3 20pin cable i will find much more than just a wire going from a few select 4 pins...
The question is: Why does it have all those pins if the ultimate connector only have 4 pins anyway?
ok, apparently i missed a pic on wikipedia that cames with no explanation besides the pinout, that hints we will have a (as far as i can tell from the pic, idiotic) 10pin wide full-USB3 connector at some point...
So, new question, is it safe to just use the 4 pins that the current usb ports use from the 20pin header? as the original question stands: the ultimate connector going out of the case only has 4 pins... why do i need to connect more on the internal plug if they are just going to be forever unused?