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Personally I find TM5, y-cruncher (FFT+FFTv4+N63+VT3) and FFXIV to be enough to test for stability, 12h+ each. Karhu is also very good but it is not free software.


First I start with loose timings to find a stable clock by adjusting voltages and impedances (if required). Then I start tightening the timings in small groups or even 1 by 1 for those that may be problematic (like tRDRDscl, tRTP, tWR, tRRDs/tFAW; and *SD/*DD for Dual Rank only). I am usually quite conservative with the primary timings (tCL, tRCD, tRP) since those are the ones that require the most MEM VDD and are not really that important.


Edit: I want to clarify that I find FFXIV benchmark to be good for testing memory OC stability due to us using our iGPUs.