Well they likely would not mention it, considering for the most part, anyone seeking true GB throughput would previously posses late model hardware.
Please don't take that the wrong way, in any sense, however those speeds are nothing to joke about, it's the real deal, and required a rather healthy system from point to point to take advantage of, for the most part.
I might try getting a live CD of a linux distrobution running, such as Solus
Grab Rufus to burn the ISO to 'USB stick' , the image can be downloaded at Solus download ( budgie will be suffice and you'll like it I think)
Test with that live distro running, to gather more data right?
If you need any at all assistance doing this, just post it!