When it comes to Ryzen 7, the 1700 is technically the same CPU as the 1800X, just clocked lower. AMD selects the chips that clock best to use for those parts with higher stock clocks, but the 1700 should overclock nearly as well, and even its stock cooler is capable of a reasonable amount of overclocking, being a 95 watt cooler on a CPU with a 65 watt stock TDP...
https://www.youtube.com/watch?v=LzIIIoSveU0
So, yeah, overclocking is generally a good idea for the 1700. You're not going to match the per-core performance of someone who's overclocked their i7-7700k near 5GHz with an expensive cooler, but you ultimately have more cores available, so there's more performance potential overall, even if most of today's games don't directly make use of all of them.
And of course, Unigine Heaven isn't actually a game, and the stability of performance in actual games is more important.