Clock Frequencies

The following chart shows how well the processor is able to sustain its clock frequency, and what boost clock speeds are achieved at various thread counts. This test uses a custom-coded application that mimics real-life performance (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 using the modern AVX vector instructions. Each of the three test runs calculates the same result, using the same algorithm, just with a CPU different instruction set.

Overclocking

The AMD Ryzen 3 3300X has its multiplier unlocked, which means you are free to overclock it as you like—unlike Intel's non-K CPUs.

However, overclocking is complicated by the fact that the processor will boost very high out of the box. My maximum overclock, using 1.25 V, is lower than the maximum boost clock. Out of the box, at default settings, the CPU will run up to 1.36 V when all cores are loaded.

I tried this voltage setting, too, but could not even achieve stability at the maximum boost clock of 4.35 GHz in all our benchmarks. The underlying reason is that the processor will intelligently detect the type of load and adjust the frequency accordingly—sometimes lower, sometimes higher, but always stable. Fixed clock overclocking can't do that, so overclocking really isn't worth it on Ryzen 3 3300X.