GTX 470's cooler seems smaller than the 5870's but the fins seem ticker...

Does not make much difference both seem about equal in mass. The voltage for the fan seems high *1.8v* how much was 5870's fan voltage?

If GTX 480 does have 480 SP's that means it will only have 32 more SP's and if we presume that GTX 470 is around 650Mhz and GTX 480 is 700Mhz how much of a speed bump will 32 SP and 50Mhz more give GTX 480 because according to most data GTX 470 ~ 5870 "stock".

A 5870 Matrix with 2GB's and 850Mhz may be a big problem for GTX 480's and not to mention 5870 eyefinity 6 2GB which is rumored to be cheaper than $500...