You could have a very voltage sensitive kit, some really start to not like over ~1.62v
That is why i posted i run mine at 1.55 and that was the sweet spot. now let me warp that for you around again. On my C0 it ran fine at 1.70 overclocked to 4.4 all the time........
Bad luck, i don't know but it is annoying as heck though.
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