This debate comes up everywhere.  So who is it?  Who is providing the silicon for NX?  Why?

Personally, I'm sold it's nVidia. To many sources collaborate a number of things with NX. The detachable controllers, the portable nature, AR features, Japanese third party support - they all overlap, and they all indicate the Tegra's involved here. I think it's the next-gen chip, but I think it's the nVida hardware.

AMD is the best choice for Nintendo.

AMD

I am going with BOTH. One for the handheld (NVidia) and one for the console (AMD). From my gatherings, I would say that the handheld is simply further along in development, so more is being released about it, OR the handheld is the only thing that devs have so far. But it is going to be one of each methinks

Whatever the next totally sourced rumor says.

My heart says AMD, my brain says Nvidia.

Whatever is it, tho, I hopes it's a noticeable improvement over what Wii U can do.

I think AMD is more likely than Nvidia, but we'll see what happens when they officially reveal it (whenever that is).

It's Nvidia.

Ultimately it doesn't matter since the GPU is going to be made for Nintendo's spec, it's not as if because the Wii U used AMD that it was magically super powerful (quite the contrary actually).

Not sure why people even have that much of a hard-on from AMD ... Nvidia GPUs seem to outperform AMD most of the time from the benchmarks I've seen, AMD also doesn't have a credible mobile processor tech ... Nvidia does with Tegra. 

Loking at this poll its seems lotsa people missed Eurogamer article about NX that later was confirmed buy multiple reliable sites.

So we have Eurogamers infos that saying NX is using Nvidia X1 chip, also those Eurogamer infos are confirmed by multiple reliable sites.
On other hand nothing point that NX using AMD, so at this point its almost certain NX will have Nvidia chip.