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Soundwave on 13 May 2016
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JEMC said:
Soundwave said:

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.

2.5 TFLOPS performance @ 50 watts would be highly attractive to Nintendo in and of itself too.

AMD hasn't talked about power consumption before.

When AMD first demoed Polaris back in December, they showed a Polaris based PC vs another one with a GTX 950 Nvidia card and how much power both PCs used. Knowing how much power does a GTX 950 use, they calculated that the Polaris card used around 50W.

As for the rest of your post, pure speculation. We don't even know if Polaris 11 can be undervolted and downclocked up to that point.

Well everything about the NX is speculation at this point, lol. Couldn't they just disable the number of usable CUs in a hypothetical "portable mode"? I don't think it'd be that big of a deal. Of course Nintendo would want a customized chip anyway, even if they liked the Polaris tech they wouldn't just throw it into a box and say "job done" I don't think.