The offset applies to all Ryzen processor models.
Not the 1700 :-)
This one never got the offset. It got a boxed cooler from startup, a tested Hardware that works for sure . And of course, the 1700 got only 65 W TDP. It get not really warm and not loud. Not like X Series, 95 TDP and no boxed cooler
The offset was only for the first time after release for the x Series in march 2017, to prevent head damage, bluescreens or crashes. Now, most of the bios can read the temp´s without any trouble for the costum cooler.
the 20° offset is disabled, since the Ryzen 5 release. Use the latest Ryzen Master Tool (1.0.1) to get a proper Temp. .
Tools like Aida64 shows you (in the maentime )the right Temp. as well.