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 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

Just like all other Ryzens, the Ryzen 7 3800XT has its multiplier unlocked, which simplifies overclocking greatly. You just dial in the desired multiplier and are done. Overclocking support is very good on all AMD AM4 motherboards.

Overclocking on our Ryzen 7 3800XT sample was good. 4.3 GHz is a bit higher than the 4.25 GHz we got in our initial Ryzen 7 3700X review. Even 4.4 GHz was stable most of the time, only some AVX loads kept crashing the CPU; higher voltage didn't help, neither did better cooling with a 240 mm AIO. Given how close to stability I got, I think you should be able to achieve 4.4 GHz stable with a little bit of luck.