AMD adds Adaptive undervolting PBO option for Ryzen 5000 processors

AMD presents a dynamic undervolt option for the Ryzen 5000 processors. Precision Boost Overdrive 2 is based on existing PBO and can bring performance gains in single and light multithreaded workloads. AMD AGESA with Curve Optimizer available in December

The central change is an upgraded Precision Boost Overdrive 2 that brings is a Curve Optimizer (voltage/frequency curve) to Ryzen 5000 processors.

The PBO adaptive algorithm will choose certain values based on the chip. The new Curve Optimization feature automatically adjusts the voltage up or down depending on whether the processor has much or little to do. Instead of predefined fixed values, you now indicate how many steps from 3 to 5 mV are taken, up to about 30 steps. This provides a dynamic range between which the software chooses the optimal value, based on data from on-chip sensors. It was not possible to undervolt with a Ryzen 5000 processor, unlike with older AMD processors. In succession with intelligent boost algorithms, which are given more leeway at lower consumption and lower temperatures, this sometimes permits higher performance than increasing the voltage. However, the result varies from processor to processor, just like with overclocking. Precision Boost Overdrive 2 requires a Ryzen 5000 processor, 400 or 500 series motherboard and a bios based on agesa or later. Ryzen Master will not support the new possibilities until the new year 2021.

Cinebench R20 ST / MT Stock PBO + 200MHz PBO2
AMD Ryzen 7 5800X 622cb / 5966cb 628cb / 5966cb 638cb / 6095cb
AMD Ryzen 9 5900X 631cb / 8210cb 631cb / 8750cb 643cb / 9054cb

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