CoreCycler

Once overclocked, your system stability is at risk. It's not necessarily that something bad will happen to the components themselves, but more that you'll have to suffer through crashes, restarts, and all manner of errant behavior if the component doesn't jibe with its new clocks and voltages.

Though the PBO algorithms in AMD Ryzen processors do well to optimize performance, modifying voltage and clock values to take things further is possible. CoreCycler is a stability test script that you can use to ascertain the stability of your AMD Ryzen processor.

Once undevolted and overclocked, AMD Ryzen processors oftentimes exhibit some very curious behavior. In short, it's not uncommon for users to enjoy stability under load and stress-testing, but have their system falter during idle and generally lower load work.

Modifying the Curve Optimizer settings to apply an undervolt across your cores, then perhaps upping the clocks by a few MHz, is a very popular trend in the Ryzen overclocking community. CoreCycler helps users test for stability across lower loads by leveraging Prime95's stress test for one physical core at a time.

The default settings use the SSE test mode and operate with a big FFT size. If you've used Prime95 in the past, these should all sound at least somewhat familiar. In any case, the default settings do well to provide a solid testing foundation, so most users won't likely need to alter the test's configuration.

If the default settings are not doing anything for you, then you may perhaps want to modify the config.ini file the script comes with. Users will be able to switch between SSE and AVX modes, modify the time it takes for each core to be tested, set a delay between the cores, modify which FFT size is to be used, and more.

CoreCycler is a program that will no doubt prove useful to AMD Ryzen overclockers. It's a very unique tool, in that it specifically deals with a problem that many Ryzen processors struggle with after being undevolted or overclocked — or both.