THIS IS A RUMOR

Keep that in mind.

Someone in Japan may have just leaked some final specs for the NVidia architecture inside Nintendo Switch. It wasn't too long ago that we got a supposed Dev kit leak about the current specs in those units at that time that has had some outside confirmations, but now we have something that appears on the surface to be a much more tantalizing prospect towards the final spec sheet. According to Nishikawa Zenji, who apparently is a really famous Japanese journalist who knew about the PlayStation 4 Pro long before it was unveiled and simply just in the planning stages, the Nintendo Switch will likely be based upon the Pascal "Parker" architecture.

For those unfamiliar with those terms, Pascal is the actual architecture used in the 1050+ range of GPU cards (their latest GPUs, and would line up with NVidia's own press release) and the fact "Parker" is mentioned is a reference to the yet to be released Tegra X2. So, what we can infer (while having no exact specs) is that this is a custom Tegra X2 chip feature Pascal architecture. While this doesn't really give us a full hint at what that means, here is what is currently known about the Tegra X2:

Parker delivers 50 to 100 percent higher multi-core CPU performance than other mobile processors(2). This is thanks to its CPU architecture consisting of two next-generation 64-bit Denver CPU cores (Denver 2.0) paired with four 64-bit ARM Cortex A57 CPUs. These all work together in a fully coherent heterogeneous multi-processor configuration.

The Denver 2.0 CPU is a seven-way superscalar processor supporting the ARM v8 instruction set and implements an improved dynamic code optimization algorithm and additional low-power retention states for better energy efficiency. The two Denver cores and the Cortex A57 CPU complex are interconnected through a proprietary coherent interconnect fabric.

A new 256-core Pascal GPU in Parker delivers the performance needed to run advanced deep learning inference algorithms for self-driving capabilities. And it offers the raw graphics performance and features to power multiple high-resolution displays, such as cockpit instrument displays and in-vehicle infotainment panels.

It's notable this comes out to about 1.5 TFLOPS of performance, which is more than the Xbox One but less than the PlayStation 4. However, the journalist notes that it is likely the performance will be knocked down to 1 TFLOP in order to have a longer battery life when taken on the go. This would also be the first real suggestion we have had that performance is gimped purposefully to make the device mobile, though it may still be possible to increase performance when docked to support the 1080p resolution natively, ramping up an internal fan for cooling. Even still, at 1 TFLOP that makes the difference between the Nintendo Switch and the Xbox One about the same as the the difference between the Xbox One and the PlayStation 4.

"According to Nishikawa Zenji, who apparently is a really famous Japanese journalist who knew about the PlayStation 4 Pro long before it was unveiled and simply just in the planning stages"

Seems like he has some sort of foot inside the industry - but yeah, this could be either a rumor, a leak or speculation for all I know. Still, I think this lends a little more credence towards 1.5Tflops inside the Switch. And like I said in the OP, I have no idea what so ever what any of this means. Is there any possibility of this being close to the power of X1 when docked? Didn't sound like it on your comment though

The source article clearly paints it as speculation with Zenji saying the March 2017 release is why he thinks it's likely to be Tegra x2 and pascal being more efficient. he doesn't address it as something he has insider sources about. Theres actually a thread for it but I can't find it atm.

The latter bit of the article is based on misinformation of Tegra X2. partially because Nvidia want to boast the highest figure possible, also because the article isn't from a site with strong knowledge on the matter. Here's a decent write up on Reddit.

https://m.reddit.com/r/NintendoNX/comments/4z80yo/nvidia_finally_revealed_tegra_parker_x2_with_more/

Unfortunately there is pretty much zero chance of the Switch matching Xbox One when docked,  unless they use 2 Tegra X2 chips, one in the device/ one in the dock.

God FP16 is goofing up the internet. We had the ps4pro at 8.4 TF and now this... It is 1.5TF in FP16 so by this logic, x1 is 2.6TF