Yes, the same chip can be used in more or less efficient ways. What they're describing includes: - Turning off CPUs that aren't in use. Turning off machines th

Yes, the same chip can be used in more or less efficient ways. What they're describing includes: - Turning off CPUs that aren't in use. Turning off machines that aren't in use, and moving jobs around to maximize that. - Improving the air-conditioning efficiency. Typical data centers use more energy moving heat around than moving bits; Google has improved vastly on that. - And more. Google has published papers on this stuff.