From owner-freebsd-usb@freebsd.org  Wed Apr 13 07:35:46 2016
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Date: Wed, 13 Apr 2016 02:34:33 -0500
From: "Zane C. B-H." <vvelox@vvelox.net>
To: CeDeROM <cederom@tlen.pl>
Cc: Dieter BSD <dieterbsd@gmail.com>, "freebsd-usb@FreeBSD.org"
 <freebsd-usb@freebsd.org>, freebsd-hardware@freebsd.org,
 owner-freebsd-hardware@freebsd.org
Subject: Re: PCIe to USB to PCIe
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On 2015-09-05 00:49, CeDeROM wrote:
> Its not USB but Thunderbolt [1] that gives you the display and 4xPCIe 
> over
> the wire, but its far slower and far more expensive than USB3 :-)
> 
> [1] https://en.m.wikipedia.org/wiki/Thunderbolt_(interface)

This is not one of those though. You can find Thunderbolt to PCIe 
adapters for
using cards outside of laptops, but this is not one of those though. 
This is
just using a USB cable to extend a 1xPCIe in a questionable manner.