on the gddr, the specs say 256bit buss, 1200mhz and 76.8GB/s. that means that with [(core speed)*(buss width)*(data rate)/8]= total GB/s

so that will give u with some math skills, 38.4GB/s*(data rate)= 76.8GB/s, that clearly leaves a data rate of 2 making it something that operates in ddr and dose 1200mhz so that is gddr3 as if it was gddr2 that would be slower and gddr5 is qdr.


there is also no spec on die size just stats so im assuming that its like the 465 making at a castrated gf100 and not a mini gf100 as the shader speed is 850mhz (aka processor speed, makes sense for the texture fill rate also) and NV rates tdp as the entire card that would not make sense for a smaller part to be rated at 100W with that clock and the 352 shader count. that demonstrates no flexibility and they need to hurry up with a real part that is useful for more than benching. with the limited 225W wall for desktop they need a smaller die that clocks higher as that would bring yields and performance up with cost down and the laptop needs a die even smaller than that that also has higher clocks that will give it more p-states for battery life and more performance.