AMD's latest APU is heading into the wild today, and among its touted features is the ability to perform high-end functions with low power sap. Testing is needed to determine if Kaveri really pushes higher performance per watt while saving battery life, particularly in smaller form factors (AMD is targeting notebooks with the APU). But until then - and trust us, testing is on the way - AMD gave TechRadar a few cases in point where Kaveri trumps the APU and processing options we've seen to date. We even get a little insight on possible usage in Steam Machines, too.