Clock Frequencies

The following chart shows how well the processor sustains its clock frequency, and which boost clock speeds are achieved at various thread counts. This test uses a custom-coded application that mimics real-life performance—it is not a stress test like Prime95. Modern processors change their clocking behavior depending on the type of load, which is why we provide three plots with classic floating point math, SSE SIMD code, and the modern AVX vector instructions. Each of the three test runs calculates the same result using the same algorithm, just with a different CPU instruction set.

Overclocking

Overclocking the Ryzen 7 5800X3D is not possible. The BIOS does offer the usual options to change the multiplier, but these have no effect. Reducing the multiplier to underclock has no effect either.

I also tried adjusting the base clock from 100 MHz to 103 MHz, but that didn't even POST.