Hi, I have been wondering this for quite some time now. Why does a gpu running at 600mhz such as my x850 put out more heat than a cpu running at like 3ghz or so such as the Pentium 830. They both use the 90nm transistor size. Doesn't heat output increase with clock rate? Or is gpu architecture that inefficient? Also why do lowly clocked gpu suck so much more power, is it again because of low efficiency?