After several weeks of delays, evga finally replied to my inquiry about the MX1617 sensor.
"Z390 Dark and MX1617 sensor
Sorry for the long delay on this inquiry. Our engineers finally got back to us and have confirmed that the z390 Dark does not use any Maxim parts...
I am not sure I fully understand.
Is the Maxim MX1617 sensor present on the motherboard, and it is giving erroneous readings?
Or, is some other sensor causing HWiNFO to see a 'ghost' sensor?
Or, is there another explanation?
I am really trying to comprehend this.
OK, got the new version, 6.30.
The two sensors in question no longer say Motherboard and CPU.
However, I was hoping they would be identified as to exactly what component temperatures were being monitored.