Xdr ram on a nvidia card will be a expensive affair. Amd being paying rambus royalties for years so it will work them out a bit cheaper using it.
The prices are going to drip soon were the 580s price is coming down more. Since it can smash any game in its path ill go for one rather than waiting another 3 months and docking up 500 to 600 usd for a faster card. Do we really need faster cards since the current ones are fast enough. And a 580 can max out everytime you throw at it