Example for one core of the T2080 running at 1533/600/1867MHz with Altivec power-gated off:
1) from the Table 6. T2080 power dissipation with Altivec power-gated off we have the VDD +SVDD power consumption at 105C is 17.2W
2) savings for one core (PH10, PH15, PH20) are provided in the Table 10. T2080 Rev 1.1 single core/single cluster low-power mode power savings, 1.0 V 105C
3) overall (three cores powered off):
17.2 - (PH10 + PH15 + PH20) * 3 = 17.2 - (0.82 + 0.23 + 0.35) *3 = 17.2 - 4.2 = 13W
