Not a problem at all for you CPU. It'll work at 100% load for 20+ years, if not over-volted. Your motherboard won't last that long, though. Probably around 10 years if it's a quality board. You'll have gotten rid of it long before any issues pop up, unless something is faulty and has yet to manifest.
Might be bad for your wallet, though. Not very many things are worth mining on a CPU.
My mainboard is top of the line MSI PRO GUARD series of 6th generation. It's good to know that my CPU will last 20+ years, cause I don't know even if I myself will be alive after 20 years
. Well I have a dual core + hyperthread and I have only set it to mine ZCASH now from ZecSupernova.cc pool (finally I found how to do it and I am mining at 4-5 Sol/s, so I am only using about 50% of my processor power
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I think I am safe, cause processor is a stock core i3 not over volted and working on extreme temperatures
. Thanks for your help. Anyway I will mine only 1 month to see the result than will start with an amd rx 460 card.
By the way is it bad for my mainboard mining with a GPU or only bad for the GPU(cause regarding the GPU I don't really care) ?