AMD. Not even a question, really. AMD has by far the best drivers. Intel is in a reasonable second place in that they at least have open source drivers and those drivers work well, but due to their newness in the discrete GPU space I still occasionally see issues on my A770. It is solidly usable for the most part though. NVIDIA? Dead freakin last. Their proprietary driver is a mess to install and only recently is able to render anything without screen tearing and unplayable flicker. The situation is improving though thanks to NVK, an awesome third-party, reverse engineered, open source driver that is seeing rapid improvement. I can play Overwatch at 165fps on my RTX3070 laptop finally, but only at lowest settings and 50% resolution scaling (it can do the same at ultra on Windows at 100%). I am very confident we’ll see NVK improve performance though.