I've found that to be absolutely untrue. Many times I used to run OCCT or something similar and OCCT would say all is well. I would then fire up a game or start BOINC and within minutes or even seconds the system would BSOD. The ONLY reliable way I've found to test any system is to run BOINC, it will load all the cores it detects to 100% and computes raw data, if a OC'd system survives BOINC, you ARE good. I've never had a single stability problem on my systems or other peoples when using BOINC as a test for stability. I run SETI with BOINC, and over the space of 2 years or so not once has it been inaccurate when I've been looking for the max stable OC.