I wouldn't give too much credit to that rumor.

First of all, AMD has had Polaris 10 chips for a feew months already and that problem would have been spotted quite a while ago. There is no way they just found it now.

And then there's this part of the rumor, stated in your linked article: The news arrived through Nordic Hardware saying that AMD's partners "won't have any new cards to display at Computex and the only Polaris cards promoted to them from AMD are R9 390/390X performance class but for a mid-range price."

That has been the alleged performance spot of Polaris 10 for a while, given that it's a "mainstream" card. Someone is making a rumor and uses other known rumors to try to give more credibility to their own one.

Lastly, if that's true, why is there a rumor about AMD having an event at the end of May to reveal/launch Polaris? http://videocardz.com/59753/amd-polaris-launch-end-of-may

I don't think processors are what we have to know...

NX is a new concept, Nintendo has unified HC and HH divisions for make a new concept for all market... we would think the NX is HC and HH but in fact a HC with dongle hdmi could be see like HH...

We need to know what Nintendo is looking for... HC / smartphone ?... HC / HH ?... Or something différents...

Mixed processors, RAM, GPU, DD, screen panel, PAD, streaming, Cartridges in a différent way...

An other thing very important about NX is Miyamoto don't take any décisions, Miyamoto is only consultant.. So we can think the gimmick of NX isn't about gameplay, it's not a new pad or something used for controls in games.

At last, what Nintendo need to stay on race... They need a OS and need online infrastructure... This two things are more consequense then polaris... 

She is more trustworthy than Nintendo.

I wonder if NX is a portable PS4 basically.

The form factor will have to be much different because a 3DS sized portable can't handle such a chip, but the more research I do on the Polaris 11 (this the laptop version of the Polaris line) the more I'm thinking this is what Nintendo chose.

http://techfrag.com/2016/03/17/amd-polaris-11-can-output-4k-vr-content-passively/

It can fit into ultra-thin laptop casings and can even be passively cooled ... that's a pretty huge deal. Something like that could likely easily fit into a chasis the size of the Wii U tablet, or perhaps not need a fan.

A Nintendo portable that can display PS4-style graphics would be ... a fairly decent game changer for them because they'd have the 3DS style userbase, but with the ability for developers to actually bring their highest end games to it. That's one of the Nintendo's major problems right now ... 3DS has the raw userbase size, but the Wii U has the console power without the userbase though, lol, so developers (especially in the West) just say "fuck it" to both of them.

You do realize that that 4K VR content is video, not games, right?

I realize that but that's still pretty cool. The Polaris 11 is still targeted to ultra thin form factors, I think that's what Nintendo has chosen. It'll give them PS4 style performance with the possibility of portability too. New form factor is probably appealling to them too because it's new/different which always is something Nintendo craves.

It sounds more and more like the two design "wins" that AMD scored were for PS4Neo (Polaris 10 + x86?) and NX (Polaris 11 + ARM?).

My bet:
an APU based on AMD+polaris, it would be a handheld displaying a 540p screen. they would sell optionally a tv dongle with processing power for helping to render at 1080p to 4k on the tv screen.

If the recent rumors about Polaris 10 & 11 are true, Polaris 11 is still a 50W chip. I think that would be a bit too much for a handheld.

I expect a Polaris 11 GPU, or at most a downsized and downclocked Polaris 10 one, on PS4Neo's APU too, as although cheaper and cooler than predecessors, a full-fledged Polaris 10 would still be too expensive and too power-hungry for a console. Obviously on a home console it would be a Polaris 11 more pushed to its limits than on a portable. Besides power and price, PS4Neo isn't a new platform, so it wouldn't fully use anyway an APU too much more powerful than the original PS4 one, and as you wrote, P11 is already enough for 4k video, so the evolved multimedia device appeal would be delivered anyway.

I think AMD has said under 50 watts for Polaris 11.

I could see it having two power modes ... full power mode when plugged in at home, and perhaps something that downclocks to 1/3 the power consumption for portable play (1920x1080 for home mode, perhaps 1024x600 for portable play?).

That would take it down to 16-ish watts, which a $30 10,000 MaH battery pack could power for 3-4 hours. Probable that Nintendo can push these power savings down even further too with their own customizations.

2.5 TFLOPS performance @ 50 watts would be highly attractive to Nintendo in and of itself too. Double the performance+ of an XBox One at 50 watts ... it's not PS4Neo, but for Nintendo that's not too damn shabby (I hope they don't go stupid again and go for a gimped chip instead). This is supposed to be a cheap chip too.