The guide mentions that sometimes the machine might not post at all and then you'll pretty much have to reset the bios. A couple of related question:
- What is usually the cause for the inability of the computer to post? Low VCore or VTT? It'd be good to know in case you made a tweak and all of a sudden the box won't boot and you have no idea what can be improved about the previous set of settings.
Because of the number of variables it is recommended to start OCing slowly as the guide decribes, increments rather than large changes which normally results in no post and failute to boot. I always save my last successfull OC so I can restore it even if I have to reset the CMOS, it acts as your baseline or fallback in case something goes wrong.
If you set your QPI, uncore or RAM speeds too high it almost always result in a no-post an your system will not start up, so be carefull when you OC those, again, small incremental OC steps work.
If you are end up in Windows and get BSOD under stress testing it is either one of two most of the times, low Vtt or low V-core. Once again I have found that Vtt is 3 out of 5 times the culprit. If you make it pass booting but get BSOD as you enter Windows then it is most probably lack of v-core
- What do you do in case there's no CMOS reset button? Pull the battery out? All boards have CMOS reset options, either in the form of a push button or a jumper, consult your board manual to see what applies to your particular motherboard, If all else fals pulling the battery will certainly reset the CMOS and set bios to default settings.
- Sometimes a certain set of settings works fine and resets fine, and is perfectly stable throughout tests, but then it might not post the next time you turn on the machine. Why? Albeit not very often I have come across what you are describing, what I have found is more often the board is not fully compatible with the RAM you using or the bios is unstable, in such a case try updating the bios or as a last resort RMA the board, as I said it does not happen much but it has a change to stock out its head now and then.