For Ryzen 7000X3D, there are no hidden motherboard options to access “X GHz” settings. These processors are officially incapable of being overclocked, at least in the conventional manner. Users must rely on technologies such as Precision Boost Overdrive 2 or EXPO (memory overclocking profiles) to obtain the greatest performance from the Ryzen 7950X3D, but these are not optimal.
SkatterBencher describes in depth each of the different ways for maximising the performance of Ryzen X3D Processors. He describes the distinctions between two Raphael dies (chiplets) included in the new Ryzen 9 X3D package. CCD0 (with 3D V-Cache) has a maximum frequency of 5250 MHz and a maximum voltage of 1.2V, whereas CCD1 (without 3D V-Cache) can go up to 5750 MHz and 1.4V. The original 7950X SKU has a single Fmax limit of 5850 MHz and 1.4775 volts.
With PBO2 and voltage/frequency curve optimizer enabled, an overclocker is able to force the CPU to operate at higher frequencies. This approach takes extensive fine-tuning, yet it can increase the Fmax frequency to 5900 MHz. This method includes decreasing the V/F curve to increase the CPU clock, although there is an even better method that uses the ECLK capability available on Raphael processors.
SkatterBencher describes how An ECLK (External Clock Generator) is available for Ryzen CPUs and how it may be used to increase the clock speed of the 7950X3D. By increasing ECLK to 105 MHz, the voltage-frequency-temperature point increases from 5.0 GHz/1.1V/50°C to 5.25 GHz while maintaining the same voltage and temperature.
Ryzen 7000X3D series can still be overclocked, however this involves ECLK and VF changes, which may be difficult for some users (SB has a step-by-step guide). In addition, the performance will differ based on the cooling system, motherboard, and, of course, the capacity of each Ryzen sample.
During Prime95 testing, the base CPU runs at 4255 MHz with all cores at 0.9V. The reported temperature is 66.8 degrees Celsius, while the total power consumption is approximately 121.6 watts. By removing AVX512 instructions, the clock rates are increased to 4553 MHz, but at the expense of an increase in temperature to 81.5 degrees Celsius and power consumption of 134.2 watts. SkatterBencher reports 4592 MHz, 83.3 °C, and 152.1 watts for AVX-512 disabled Prime95 workload with ECLK/PBO/VF overclocking (remember this is average frequency from all cores).
This overclocking improved performance by up to 9 percent in synthetic benchmarks. Sadly, it provided just a marginal performance boost for gaming, as demonstrated by this slide:
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