Is the ram overclocked. The ram tends to be the first to fall over. Are you on stockcooling? what I would do is slacken the ram timings first and test with something like Prime95. If it still falls over I would tweak the vcore a notch or 2 and I would set the Vdimm to its operational maximum. Also have a look at what other voltages your bios allows you to tweak one often forgotten when overclocking is the northbridge