AMD's Precision Boost Overdrive 2 brings with it adaptive undervoltage
Source: IO Tech added 23rd Nov 2020Adaptive undervoltage of PBO2 should improve performance with both single and multiple filaments, while traditional undervoltage mainly benefits multi-filament loads.
Precision Boost Overdrive 2 and its new Curve Optimization tool allow the processor to adaptively undervoltage in a variety of operating scenarios. In practice, the tool estimates the current load, clock frequency, temperature and other similar values once every millisecond and tries to reduce the voltage to the lowest sufficient level within their limits. According to the company, this type of under-tensioning benefits both single and multi-strand stresses, while traditional under-tensioning mainly helps with multi-strand stresses.
For Precision Boost Overdrive 2, the same truths apply as for overclocking, meaning each processor is an individual. Therefore, the benefits of the technology also depend on the processor individual and its operating conditions. The user is given the possibility to adjust the voltage by +/- 30 steps, each step corresponding to about 3 to 5 millivolts depending on the load, and the settings can be set either jointly for all to cores or core by core. The sensors in the system should ensure that the voltage does not fall too low.
According to AMD’s internal tests, the feature would provide an improvement of about 2% on a single thread and a improvement on multiple threads when the control is the same processor with traditional undervoltage. The test processor was Ryzen 9 20201123 X, which according to AMD should benefit the most from the technology in theory.
The Precision Boost Overdrive 2 Curve Optimization tool is generally included on AMD motherboards with the AGESA 1.1.8.0 update, although it is known that on some motherboards the feature already exists in current versions 1.1.0.0. AGESA 1.1.8.0 BIOS updates should be available in early December. The feature requires the Ryzen 5000 processor, as it takes advantage of some of the new features built into them.
Source: AnandTech
brands: AMD media: IO Tech keywords: Ryzen
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