I wonder why they wouldn't use TSMC if they're already using it for their 12nm? Or do they think Samsung can produce better dies/ larger quantities since TSMC isnt splitting resources... (Could also be cost too)

Seen some other articles referencing nVidia still having TSMC do 7nm with the DUV process, so not entirely sure whats up.

A different article, so maybe a split between both manufacturers.  https://www.techpowerup.com/251229/nvidia-to-implement-7nm-euv-node-for-its-2020-gpus

@Ithanul Did you see the comments on the TechPowerUp article you posted? Quite entertaining if I do say so myself