Speculation time!

Some of the stuff above doesn't make that much sense though.

i - Rather than being 15-20% faster than the GTX285 (5850) or 10-15% slower than it (4890), this could fit in the middle. Aka faster than 4890 too.

ii - MSRP is $200++. 5770 goes down to 140-160. 5750 goes down to 120. ATI would rather make it faster and earn more money per GPU sold snce this is not a mass market castration.

iii - Depending on Cypress yields, they'd either cut more SPs from 1440 or reduce clocks even more. I'd expect TDP in the 130W range.

iv - (hopeful) 1 6-pin connector. Would be perfect for those with puny PSUs upgrading from their GTS250s.