Obviously they are not gimping their cards. For one it would be marketing suicide as soon as someone could prove it but the legally of such action would even be questionable. But you have to wonder how hard they work to improve pascal though. I mean at launch the 1070 and Vega 56 were pretty much neck to neck (it was a 1-2% difference). I went with the 1070 because i trusted nVidia more than AMD and nVidia served me well for the past 10-15 years or so. But when you look at the 1070 versus 56 today man it hurts. The difference is around 10% on average in favor of the 56 and can be up to 30% in some games like Dirt 4 or RE 2. If i had a Vega 56 (or better a 1080 but that card was out of my price range) i could probably wait next gen to upgrade but 1440p and 1070 don't make an happy couple.