What is the maximum Vcore setting for a Ryzen 7 3800X?
What is the maximum Vcore setting for a Ryzen 7 3800X?
LOL so is disagreeing with and attempting to correct someone harrassment in your country? If so, you don't have to read this or any other of my posts. This is strictly for the use of others who may be mislead.
You're not understanding your reference to the source. Yes, an electric field (difference of potential) is present, it has to be or a current would not flow. That doesn't make it the cause of electromigration. It's like saying 'reproduction occurs in the presence of oxygen'. Yes, the organisms need the oxygen to survive but it's not what makes it happen.
Honestly, I dont even know why PBO is an option because it makes things worse. I prefer to manually OC the cpu. For example in my case with ryzen 7 3800x there is no point to OC it at 4.2 because it already reaches that with all cores in a stress test. The idea is to go to 4.25 or above, frequency that cannot be reached in a stress test in stock form. I reached 4.45GHz with 1.45v and stable. I didn't want to go higher in voltage than that. However, I noticed in CPUID that VID reaches 1.5v sometimes which makes me believe that's a voltage well supported by this cpu. On the safe side it's better to listen what the engineers from AMD advice us and not go over 1.42v.
It was shared by zx128k. The idea is that electromigration occurs when increased amperage results from high voltage applied to the CPU, and it doesn't really depend on temperature. However, the degradation still happens because the high current causes ions to shift and atoms to be displaced. You mentioned that as long as heat generated by the high current stays within safe limits, degradation won't occur. Of course, dissipated heat is linked to high amperage, which increases with voltage. Raising one leads to an automatic rise in the other. I had the same thought—proper cooling doesn't matter if the voltage is controlled. I'm still unsure which is correct.
It's both the present and the temperature. To cut down the heat at a specific clock without altering cooling, the best approach is to reduce voltage because (voltage multiplied by current) equals power divided by heat. Regarding voltage, the only guidance AMD has been gives is to stick with auto mode, allowing the processor to decide what's safe for itself. When left alone, it will automatically lower voltage and adjust clocks to safe levels depending on temperature. If you push a Zen2 processor under heavy load (such as Prime95, small FFT, AVX) in full auto without PBO, you might notice voltage dropping as low as 1.2 volts, with clock speeds matching or just above its rated base frequency. This seems to reflect AMD's recommended safe setting. Some refer to this as the FIT voltage, which varies by model and is set during manufacturing based on silicon performance in binning tests.
Keep an eye on overclocking videos on LN2 (there are many technical clips). They often increase voltage up to the limits of the VRM controller—sometimes reaching 1.55 to 1.6 volts or more, even adjusting it beyond safety thresholds. These chips can handle currents over 200 amps at frequencies above 5 GHz. How is this safe? Even for just a short time to test performance and benchmarks? You can be confident they're not compromising their quality. Many of these are 'gold samples'—representing the top silicon after extensive testing and selection. They must function properly in competitions.
The truth is, they're kept at temperatures of -100°C or higher on LN2. This minimizes electro-migration even under the extremely high current densities they experience.