8GB ram upgrade for Mariko?
Well, that's very interesting indeed. It would seem to rule out a simple internal refresh or Switch Mini. A full Switch 2 a little over a year after the first seems just too quick for me, though.
Not wanting to drag things into crazy off-the-wall speculation, but back in Nov 2016
a rumour appeared purporting to be from Foxconn with a number of details about Switch that hadn't yet been revealed. As it turns out, many of the details turned out to be exactly right, including precise battery capacities for both Switch and joy-cons, the red and blue colours for the joy-cons and the SL/SR buttons, among others.
It also had a separate part, detailing another device, described as a dev kit, which had the following details:
- Producing 2000x units for now
- The core is 1x times bigger than the one above,200mm2, looking it looks like 12x18
- Extra ram, this version is 8GB
- No dock for this version for now. Can be plugged into TV without docking, power is inside
- Speculated provided the core is only include GPU, it would be even more powerful than PS4 pro
- Screen is the same size as the normal one
- It's much more powerful, but also much heavier, not feeling great in hand, speculated for 4K gaming
- Haven't seen such a huge core, and it's 16nm + 100mm2 main core
- There's no battery inside this version
It seemed a bit out-there, but the rest of the rumour turned out to be dead on, and there are a few interesting parts in there. For one, the size of the extra chip corresponds exactly with the GP106, used for the GTX1060, and the RAM is, yes, 8GB. The timetable would also line up for a device launching late 2018, using the T210 and GP106 as a stand-in for a future more powerful SoC (eg T214?).
The GP106 could have simply been the most easily available stand-in for the performance target they were looking for (a 4K Switch would only need a ~GTX1050 level of performance). The existence of the screen does seem quite strange, though, as even a substantially cut-down GP106 would be far too large and power-hungry to fit in a portable form factor.
Maybe a devkit of some kind?
Devkits don't get their own SoCs, and typically don't have extra RAM anymore these days either, as far as I'm aware (I think the original Switch dev kits all had 4GB).