Unverified dev guesses: NX might more powerful than PS4/XBONE, based on a PC demo...

[JEMC]

se7en7thre3 said:

If Nintendo does go with Arctic Islands NX can very well match or exceed PS4

AMD 14nm/16nm Arctic Islands GPUs Arriving In 2016

 "Su confirmed that AMD is set to update its entire graphics portfolio in 2016.  The new family of GPUs will feature significant architectural enhancements as well as cutting edge FinFET process technology to deliver twice the performance per watt of AMD’s current graphics offerings."

"This graphics architecture will power everything from next generation mobile and desktop GPUs to APUs and semi-custom chips. There’s also strong evidence to suggest that Nindendo’s next generation gaming device “Nintendo NX” – which is coming next year – will be powered by an AMD semi-custom SOC. Making it a very likely candidate to feature AMD’s 3rd generation “Arctic Islands” GCN architecture." 

Be careful with Wccftech. What they publish is mostly industry rumors (without verifying if they are true or not), and that last sentence is pure and simply a guess.

Also, just to say it all, "Artic Islands" is the code name of the next gen of graphic cards from AMD, but in those "Artic Islands" there are three different designs: Greenland for the high end, Ellesmere for the mid-range and Baffin for the low end, so even if Nintendo used one of the Artic Islands chips, it could be weaker than PS4/X1.

In summary, don't believe anything about NX unless it comes Nintendo or from one of those articles where a console is teared appart and its components are revealed.