80C is indeed a tad warm for gaming temps (at least 19C above normal gaming temps compared to a 7700K equipped with a Noctua NH-D15, assuming stock operation. (Perhaps 80C is not 'dangerous', but, warmer than it should be, with most liking temps of stock 7700Ks at sub-70C. Your temps might be in line for a single stack/single fan cooler only ~39% the size and surface area of some of the more premium air coolers.
The H7 isn't capable enough for good thermals on any i7 that sees a lot of sustained loads. And especially if it's overclocked, but even at the stock configuration it's likely to toe the line. Even more so if you don't have a very good case cooling configuration with at least two front intakes and both a top and rear exhaust fan(s).