One thing to note is that in the second graph, the frequency/power lines cross at about 20 watts per module or 10 watts per core. So the high density libraries make sense for mobile computing, where the power budget is small. AMD might also use the excavator core in a server chip, which often use lots of cores running at a relatively low frequencies. But the high density libraries seem like a poor fit for desktop users. For example, 8-core FX-8370 has a TDP of 125 watts, or 15.6 watts per core. When some cores are idle, the FX-8370 increases the speed of the remaining cores, drawing even more power per active core. So for desktop processors, we should expect the use of high density libraries to result in lower clock rates.