"The Carrizo SoC, using Excavator cores, was touted in the press as being the biggest upgrade to the base Bulldozer design since the introduction of Bulldozer itself. This was as a result of new high-density silicon libraries, a new voltage/frequency response unit based on internal sensor data, a redesign of the metal stack to afford high density, improvements to caches and scheduling, improved video units for 4K decode, and a mobile-driven focus for the platform. Today AMD is launching the second version of Excavator, based on an updated core, in two forms: Stoney Ridge for entry level notebooks and Bristol Ridge for mainstream devices".
The 7th Generation APU, in silicon, is by and large similar to the 6th Generation platform called Carrizo with some updates to help drive efficiency and improve performance. This is due to the updated Excavator core, primarily supporting DDR4 memory through the controller (similar to the R-series embedded AMD parts announced earlier), but also tweaks to the 28nm Bulk CMOS physical design that improved the voltage/frequency characteristics of the silicon. This combined with new AVFS (adaptive voltage frequency scaling) algorithms via improved through internal sensors enables AMD to offer a higher frequency for the same Thermal Design Power on the 7th Generation. With this, AMD is claiming that a move from a Kaveri ‘15W’ APU in 2014 to a new Bristol Ridge APU in 2016 can afford a 56% increase in raw CPU performance, or +10% over last year’s Carrizo.