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| JRPGfan said: The problem is: at 28nm the PS4 uses like 100-112watts (CUH-1200) playing a game. at 16nm the PS4 uses like 63-86watts (CUH-2000) playing a game.
^ that is waaaay to high for a portable, even at 7nm it would still be too high. Even if you "keep" the performance the same, atmost you ll probably see a reduction to like half the power of the 16nm chip. a 31-43watts "portable" at 7nm would not work. It would need to be like a laptop or something then... lol.
Maybe its possible to lower power-usage other places, HDD, fans, other chips & components. But I doubt it ll be a sensible design to go for. |
nVidia's Volta-based Tegra should be "close enough" to an Xbox One in ideal scenario's that play to nVidia's hardware strengths.
And that is still built at 16nm Finfet.
The Switch is using a chip based around Maxwell at 20nm, if Nintendo opted for a Pascal based Tegra chip, Nintendo could have achieved 50% or more performance for the same amount of power.
At 7nm using a newer and more efficient GPU architecture, aka Volta's successor, performance that is "Close enough" to the Playstation 4 in most of the important metrics should not be a problem. (Things like Bandwidth will probably still come up short of course.)
The issue with taking an Xbox One or Playstation 4 SoC and using it's power characteristics in some kind of guestimation for mobile power consumption/performance metrics is highly inaccurate. It's chalk and cheese. So please don't do it.
For one the Xbox One and Playstation 4 has an AMD CPU, AMD CPU's tend to be slow, hot and generally inefficient, especially Pre-Ryzen, that's compounded by the fact that Jaguar is also old at 4 years and being an evolutionary successor to bobcat... It's not lighting anyone's fires, it wasn't even a fast CPU on it's release.
It's also using a Graphics Core Next 1.0 GPU. Which is also slow and inefficient and doesn't using newer technology's that save on processing power and bandwidth when rendering games... And next to more modern GPU's is simply terrible outside of Asynchronous Compute, keep in mind that Graphics Core Next 1.0 is 5 years old, it's ancient, GPU's have come a long way since then.
For a "Playstation Portable 3" I would expect nothing less than something that is Volta powered, 8GB LPDDR4 memory and a bunch of ARM cores with a full 1080P screen.
I would prefer for the PSP 3 to use Volta's successor, 8GB LPDDR4 memory and a 1440P screen though. Which should be doable in 2018.
Remember, the Switch was underpowered before it was released... In a year or two, your hardware expectations need to be higher.
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