IMO you should not upgrade for some game that is not out yet if you were satisfied with your previous system. By the time the game is out you probably would get a GPU that is faster than GTX580 for the same amount of money.
This is what they used to render Avatar.
This is why we are not getting the prerendered quality on our 3D games yet. Even the mightiest ATI and Nvidia cards will not hold a candle against these monsters.
It is not stated how long did they need to render for each frame. I don't know when will...
Yes I posted all that to prove that they aren't 100% the same because someone is saying the difference is just the bios and that link from techpowerup show otherwise. I did not post that to show that 6950 will not unlock or maintain 6970 clockspeed.
Just in case you missed my quote.
This from here http://www.techpowerup.com/forums/showthread.php?t=138247
Just in case you are too lazy too click it.
(Source: can be seen with the eye)
The two cards have a different power-connector configuration.
6950: 2x 6 pin
6970: 1x 6 pin and 1x 8 pin
1. I can't help you here.
2. Supersampled Transparency AA only works on transparent texture for example chain link. You still need regular AA for the edges. More detailed explanation here http://www.nhancer.com/?dat=d_AA#transparency
No not really. A few really do not unlock. You can go and read the extensive thread at techpowerup. Even some poster here are having trouble. Here is one http://hardforum.com/showpost.php?p=1036674665&postcount=326