AMD yesterday introduced its new Ryzen 6000 mobile processors, known as Rembrandt. The company claims that these chips offer a true generational leap in power and efficiency, along with improving the integrated GPU, which has been AMD’s weak leg until now.
The silicon chosen to build the Rembrandt architecture is built in 6nm, with TSMC’s N6 fabrication being chosen, which takes advantage of EUV lithography.
Rembrandt combines a 8-core, 16-thread CPU based on the new Zen 3+ microarchitecture with a new large GPU based on the RDNA2 graphics architecture, with real-time ray tracing support, a DDR5 + LPDDR5 memory controller and PCI-Express Gen4 support.
The biggest engineering investment in the Ryzen 6000 is its power management redesign, which heavily leverages power-gating (as opposed to raw power).
All major components of the processor, including individual CPU cores, individual GPU compute units, memory controllers, and the display controller, can be put to sleep through power switching.
This allows the processor to take advantage of fractional second opportunities within its normal usage to put certain components to sleep. In those seconds significant amounts of energy are saved.
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These power naps, as Tech Power Up calls them, have a multiplier effect on power efficiency, and AMD claims that battery life has improved significantly.
Rembrandt’s energy optimization is achieved by taking a five-pronged approach. The first is the improvement in energy efficiency obtained with the change to the 6nm process, which represents an increase in transistor density of approximately 18%.
The second is the optimization of the CPU microarchitecture, with very precise power control of the individual cores within the CPU.
The third includes the optimization of the power at the SoC level, which introduces several new power planes and deep component partitioning that allows virtually all redundant/scalable components to be turned off when not needed.
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The fourth is firmware level optimization. Now the system has more interactivity with the operating system to understand the nature of the performance demand.
And finally, regarding the platform. AMD will work with manufacturers to choose the most efficient components on the market, which will be combined with AMD Advantage technology.
With all these steps and advances, AMD claims to have achieved the highest performance per watt in its history, easily beating Intel’s 12th Gen, the so-called Alder Lake.