Considering that the MSRP of the 570 was $170, and mining demand died off, could just be falling back to where it would naturally be. And could be them moving to clear out stock (doesn't necessarily support the 12nm Polaris 30 rumors though, there's probably a lot of extra cards that were produced for the mining boom that are still in the channels).
And why would the do that? Would make no sense business wise.
true but it's little benefit for a large investment. The only reason this can pay off for AMD in the big picture is due to the WSA.
I don't think its that big of an investment. Supposedly they could almost directly port their 14nm stuff to 12nm. In fact, I kinda think that most likely the 14nm process they were using is now just the 12nm process.
I was skeptical of the GDDR6 talk, but it might be more feasible than I think as GDDR6 isn't much more expensive than GDDR5 (seems like its only like 20% higher), but because of the higher speed and density they can use fewer chips to get the same bandwidth, and even reduce the memory bus to like 192 (25% bus width reduction, but like 45% faster memory speed, it would still have more memory bandwidth), so it could help them lower other costs (board traces, smaller board. But they could stay with GDDR5 and still see an uptick (they weren't using the fastest GDDR5 chips, let alone GDDR5X).
They need something to keep OEMs supplied, so that's the business case right there. AMD is targeting large consistent sales even if they are lower margin, it provides solid revenue that holds up more consistently over time (its why they pivoted with RTG to a big focus on semi-custom business like consoles).
And I think there's a decent possibility that Navi stakes out the $200-400 range (and they wait on doing cheaper ones until 7nm matures and costs fall), so they could use Polaris to stake out the $200 and below for most of 2019. That would still offer a solid option for budget conscious people (especially if Polaris 30 brings a decent 10-20% performance and/or efficiency uptick), and it'll help with the wafer agreement.
Oh, and if Polaris 30 does bring improvements, I assume it would initially be priced like previous Polaris, and then dropped in price.