“Unpowered” AMD Ryzen 7 5800X3D processor was overclocked to 5.14 GHz. But there is a nuance.

After the official premiere of the Ryzen 7 5800X3D CPU with a huge cache, AMD officially announced it as unclockable, which is even a bit offensive, because the regular Ryzen 7 5800X is quite well overclocked. However, as it turned out in practice, Ryzen 7 5800X3D can be overclocked too.

This requires the motherboard to have an external clock to change the frequency of the BCLK bus. This is about the same as with the Intel Alder Lake processors which are not overclocked. Some AMD X570 chipset motherboards have such a node. For example the MSI MEG X570 Godlike. That is what was used in the experiment to make Ryzen 7 5800X3D run at 5.14GHz. Recall that the maximum frequency of this CPU in normal operating mode is 4.5 GHz.

To reach 5.14 GHz, we had to raise the bus frequency to 113.01 and increase the multiplier to 45.5x. Interestingly, the voltage was only 1.2V. The result is documented, but there is one point that draws attention: performance tests of the overclocked system were not conducted, so it is not clear how stable Ryzen 7 5800X3D works with such overclocking.

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