Well you said
What do you mean by this then?
In case you didn't follow the thread. People have read the OP and ran with looking at PS4 1.84tflops and adding that to 3.6tflops and stating somewhere around a 280x like Durante said. This is comparing the same GCN family. This is twice the spec which others have said not me.
Twice the performance. If you want that then comparing something between a 7850/7870 to a 280/280x doesn't get you 2x the performance even though it's double the tflops (OP says 2x performance and I replied to a guy with a good question). If you want double the performance in games you need to go to something like a 290. it's clear as day in my post. I mention fuck all of coding to the metal. 280x over a 7850/7870 gets you around 70% as stated in my post, clear as day.
I have a gtx 970 and it's definitely not suited for 4k ( even at 30 fps) in all current games.
In a majority it's fine if you settle for 30 fps and turning a few things down, in some you can even comfortably do 60 fps at 4k, but most of the ubisoft stuff or witcher 3 etc is a no go unless you put settings way way down (like below ps4 settings, do you see a developer put the settings below those of the 1080p ps4 version to get to 4K?)
OP's rumor doesn't put it at gtx 970 performance either (would need to be a 2.5x bump for that not 2x
You've just repeated what I posted. My post is settling for around 30fps, it's right there in the post. I even mention the games, Shadow of Mordor, COD AW and these are running higher than console and get 30fps or more at 4k. I own a 970 and play these resolutions every week. In AC Unity I drop down to something like 2880x1620/3200x1800 and have way higher settings than console.
You should check out some benches of 290/970 compared to 7850/7870, it's 2x-2.25x the PS4. Keep in mind PS4 is not a 7850 nor a 7870 but something in between.
Take a peak
http://www.anandtech.com/bench/product/1076?vs=1068
I have to go now. I don't have time to update you on more benches. My post is about getting 290/970 perf in a console type box with typical power requirements which many believe you need some $1000 PS4 or it's impssoible. 4k is not some way out there thing. Nvidia already have this down to 150W in 2014.
Just to help you some more
Nvidia dropped a Titan performance using keplar at 250-300W down to Maxwell 970 150W in two years on the same 28nm. getting 970 at 150w down to 100W is feasible and this if AMD has caught up could see something good. I'm not saying AMD has done this. PS4k could be like a 280. Nobody knows. I'm just saying it can be done and you guys have some way out there thoughts on 4k just like many in this thread or here
Last weeks thread of 4k needs alien tech, 980ti out the ass. No please look at the benches.
http://www.neogaf.com/forum/showthread.php?t=1198430