Power management is
rapidly reaching the point of diminishing returns as
the majority of power savings are focused on system areas external to the CPU, integrated
graphics IGP and chipset power envelopes. The AMD 'Richland' platform incorporates some concrete improvements on the power saving front according to AMD representatives, mostly
with respect to improved thermal sensing vis a vis CPU throttling.
The following screenshots from AMDs presentation
are fairly technical, in real world terms power management has improved to the point where we can get 6hrs of HD movie playback out
of one charge from a 2013 "Elite Performance APU" based notebook.
The majority of power improvements with the
AMD 'Richland' platform are straightforward optimizations. These optimizations make better
use of existing thermal sensors in the 'Trinity' architecture, boosting available head room
by scaling CPU performance where possible. The previous implementation relied on theoretical or averaged results,
with 'Richland' real time data is included in the algorithms for a more
'granular' approach to power throttling.
Intelligent Boost essentially balances the
thermals between the CPU and GPU regions of the core so the power envelope is
is a new feature with the AMD 'Richland'
platform which uses pre-existing analog temperature sensors distributed across the
silicon CPU die that were previously not incorporated into the performance management software.
The performance algorithms now factor in real time
temperature sensor data from different regions of the CPU into
calculations. Without getting too technical, this optimized approach allows better performance throttling with
the CPU and IGP. The end result of Hybrid Boost is improved
efficiency without architecture changes, according to AMD.
a look at the new Brand: AMD.