I think the PS4 can receive a gig. At least it should get over 350. Can consoles receive a gig? My PS4 is hooked up right next to my PC so I've been using that to test it also.
I've rebooted/pressed the button/unplugged it several times now.
I got a cat 7 cable (it was quite a bit cheaper than cat 6) but my speed dropped down to double digits. So I stopped using that cord. I may try it again.
The PS4 can receive a gig, but very rarely have I heard of someone getting the full coverage. Usually people have their PC running up to 900 just fine but their PS4 goes anywhere between 50 and 200. That's what I hear, at least. The apps running on the PS4 and Sony's network, environmental factors, as well as the users' premises, are on fault.