Thank you both for pointing this out. I saw that, according to Patriot's site, the Viper Steel 4400MHz has a secondary XMP profile of 4266MHz at 1.35V, so I would assume that it will work at least with that second profile. Correct?
I saw that by using memory with lower voltage (1.4 max) the alert disappears. The question is, will the 1.45 be compatible with 10600K despite pcpartpicker's alert?
I have the following build in mind: https://pcpartpicker.com/user/jackcalico/saved/Zx3mrH
PcPartPicker however is showing the following note:
"The Patriot Viper Steel 16 GB (2 x 8 GB) DDR4-4400 CL19 Memory operating voltage of 1.45 V exceeds the Intel Comet Lake CPU recommended maximum of 1.35...