Quote from: tnicks on January 11, 2014, 09:38:05 PM

Quote from: Pita on January 11, 2014, 09:24:29 PM

Quote from: tnicks on January 11, 2014, 08:56:49 PM

Quote from: RickJamesBTC on January 11, 2014, 08:51:36 PM

Quote from: tnicks on January 11, 2014, 08:47:32 PM

Quote from: RickJamesBTC on January 11, 2014, 08:34:22 PM

I wasn't being an ass, you asked a question about a totally different product. These don't connect the power lines. Power is supplied by the molex, I have tested amp draw on all the lines. There is no "current backflow". This is NOT a ribbon cable, but a usb cable. These are designed for this purpose.

If you say so bud. Confirmation that none of the 12v lines were connected back to the motherboard would have been sufficient. I'm aware they are different products, that's exactly why I had to ask the question.

You didn't ask, you said you had seen tons of motherboards fried with these risers. That's not true.

Yes, it appears I slipped in an errant "these" in my original question that did however reference ribbons. I've edited it for clarity, as I was speaking about risers in general, so sorry for the confusion. USB carries power obviously, so it's impossible to know if the 12v line is connected back without actually asking the question.

Standard USB signal cables carries power. This question was asked couple pages earlier if these were a PCIe to USB signal and back conversion, which it is not. The USB cables are just physical wires that continue the flow of PCIe signal between the two boards with no USB conversion. Hope that answers the question.

Thank you, I must have overlooked that when I read through the first time. That's what I was looking for.

And also for those that are curious about these boards. The lines the USB cable carriers would be the 2 differential serial data pairs, total 4 wires from pins 14 & 15 on B side of edge connector and pins 16 & 17 from A side of edge connector, for the TX and RX signals. If you are curious about any of the ICs on the x16 boards, since the ribbon cable style extenders have all pins (with exception of 12 V and/or ground for the separated versions) connected, these will automatically provide all JTAG and 3.3V lines. Since this USB style one does not have these lines, the black IC on the board is the 3.3 V voltage regulator which receives its power form the external 4 pin molex connector, which has a 12V and a 5V line on it along with 2 ground/return lines. The capacitors are used for any noise cancellation/stabilization of the power lines. And since the JTAG is not used for our needs, we can just scrap them...