Intel to show off Sandy Bridge at IDF next week, AMD counters with Zacate demo nearby

[kl0012]

80 low clocked SPs is more efficient than 40 high clocked SPs

You're wrong. The power consumption delta between let say 700Mhz and 500 MHz (assuming the same voltage) is much less then power consumption of additional 40SP (here you should add a leakage into equation)

also 790gx is based on 55nm, so why even compare tdp

Dosn't it contradicts your statement? Potentially 40nm 790GX would have even lower TDP.