AMD Ryzen processors use a table with multiplier and voltage values, which are possible clock speeds that the processor will use depending on the workload, power budget, temperature, and other factors. The new Power Curve Optimizer, or PCO, allows us to shift all the entries on that table up or down, adding voltage (and generating more heat, something we're not really interested in today) or reducing it for each multiplier step. Negative adjustments are pretty interesting, because if the chip can handle it, the PCO can goose the chip into running faster at a given voltage and get some more performance...



Link: hothardware