For some reason I thought, meh, it will be around 480gtx performance, but then realised its got 470gtx specs with more clock speed and shaders, as in, its still got the reduced bus and memory size, which will limit its bandwidth, though not a lot. How much bandwidth does a stock 480gtx have, the 570gtx has higher mem speed, slightly, but not sure which ends up with more bandwidth.
If it comes anywhere near 470gtx EOL pricing, it would be a great card, assuming it hits early 470gtx pricing, its a non starter of a card.
Why exactly would you see those specs and assume it can do well over 900Mhz on the core? Won't 2x 6pin pci-e power connectors make it very hard to push the same power/overclocks as a 580gtx would?
EDIT:_ 177gb/s bandwidth on a 480gtx, 152gb/s on these, so same shaders, 5% clock bump, around 15% less bandwidth. Will be interesting to see if some games show a drop in performance and some show an increase depending on their bandwidth hogging nature, but it will likely cost it at higher resolution/aa settings. EOL 480gtx's might be the better choice as the last ones crash in price, over a 570gtx with reduced bus.