I recently tried to OC my ryzen 2600x with pbo + xfr with bclk. Bclk set to 103 and ram at 3333 cl18(3430 with de bclk). I ran prime95 blender for 3h and aida64 with cpu,fpu,memory and cache for 7h without crash. Can I consider my OC stable?
Double-triple plus to that. It's especially dangerous to OC using BCLK if you have a M.2 PCIe NVME drive as it can leave the NVME permanently innaccessible...bricked, in other words.
But if you must, a whole-system stress is probably the best for this type of OC. So run RealBench for 7-10 hours or so. It doesn't hit the processor especially hard (Prime95 small FFT's will do that) but it's hitting everything including memory and drives. Even the GPU with OpenCL processing which means it also hits PCIe really hard.