3600x is a Ryzen 5, not a Ryzen 7.
WTH is a "pre-water cooler"? I've never, ever, heard of a "pre-cooler", water or otherwise, for PC hardware.
Why are we trying to compare the temperatures of a Ryzen CPU with an i7-970? They are not the same, or even similar architectures, and not even from the same camp? It's apples to oranges, and there is no comparison to be made.
To answer your question, it is not ABNORMAL for you to have those idle temps. In fact, idle temps are largely immaterial. All that REALLY matters are your full load temps.
So long as you are not exceeding 80°C while performing the following thermal compliance test, then you are fine.
Full thermal compliance testing procedures can be found towards the bottom of my...