I've seen a few spikes into 80 playing bfV but whenever my ac kicks on it never goes higher than 70 lol is core temp pretty accurate?HWINFO64 is probably the best. There is a lot going on though.
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As far as temps go, working in the 60s is just fine and where you want to be. There is no problem getting into the 70s. A spike to 80 or so is ok. If you are running a CPU benchmark you would expect temps around 80 or so. This is a good test to ensure your cooler is working well and that your setup is not out of whack.