For those who sustain with {hardware} information and critiques like ours, then you definitely’re little question already conscious that AMD’s Ryzen 7000-series processors run sizzling by design, and they are often fairly power-thirsty, too. In ages previous, we might repair an issue like this by undervolting, and that is precisely what Reddit consumer MyKillK has performed along with his Ryzen 9 7900X.
The advantages? He dropped his CPU package deal energy draw down to only 97 watts—a drop of round half from the inventory worth. This had results on his temperatures too, as you’ll be able to think about. Whereas Zen 4 CPUs are designed to experience the ragged fringe of their thermal restrict at 95°C, MyKillK’s 7900X is staying at a relatively-cool 75°C below “probably the most excessive testing,” which seems like OCCT AVX Linpack primarily based on his different feedback.
These advantages have been achieved by a cautious technique of tweaking and testing over the course of a number of hours. MyKillK mixed a basic core voltage offset with Ryzen Grasp’s Curve Optimizer operate to finish up with a -50mV total undervolt after which particular person offsets for every core starting from -30 to -27 mV. This ends in per-core undervolts between 77 and 80 mV, decreasing the core voltage from ~1.4V to ~1.31V.
The Redditor admits that he isn’t utterly positive the system is completely steady, however that it hasn’t given him any bother regardless of fixed utilization and transient stress testing over the past day and alter since his unique put up. Probably, the factor most affecting his efficiency is the -100 MHz PBO enhance override setting. It actually helps with stability however will drop efficiency barely.
We have not examined undervolting with the Ryzen 7000 sequence but, but it surely seems like AMD’s gone for fairly excessive security margins. It is attainable that AMD was involved about competing with Intel’s forthcoming Raptor Lake CPUs, and that is why it elected to push the chips to this point previous their frequency/voltage candy spot. Regardless of the precise purpose, it is clear that Zen 4 customers considering tweaking can drastically scale back the facility consumption of their new CPUs with out shaving an excessive amount of efficiency off the highest.
