so ive been ming for a couple days. i have my power limit set to 80% but i noticed on the graphs(https://imgur.com/a/f5DVVfw) that there are some spikes over the limit, up to 100-120% at the peaks of the circled spikes.  is this a reading error or something that absolutely shouldnt be occurring?

Another question I have:  I have read that running GPUs at 100% power ruins the longevity of the cards.  Does overclocking the core and memory clocks have the same effect?

Last question: I've seen conflicting information.  Does running at 100% power ruin cards or does running at high temps (i.e. 70+) ruin cards.   ive been running at 60% power and have been only hitting 39-51C.  is it safe to up the power?  the thing im struggling with is finding overclock settings.  what ive been doing is upping the core by 25 and the mem by 150 and seeing if its stable.  but i feel like ive already overclocked it further than i should.  how do i know when its too much? right now im sitting at 60% power, +150 core, +700 mem mining mtp (zcoin)