Same core as the HD2900XT and just more/better memory? 8O
So i don't think that it would be able to defeat the 8800GTX/Ultra.
Maybe kills the 8800GTS for good but as the site said:
...1024MB of GDDR4 memory cost noticeably more compared to 512MB of GDDR3.
So it will cost much more than 8800GTS 640MB.(maybe same as GTX or even Ultra)
So whats the point in buying such a thing?