As I understand it, the extra 4 pin powers the cpu, so I suspect something may be wrong there.
Is it properly in it's socket / thermal paste applied / cooler correctly installed / cooler fan plugged into mobo?
Dell XPS 13 9370 (2018) review
The art of 'British' pulp fiction
Best password managers for Mac
TV & streaming : comment regarder le Tournoi des Six Nations 2018 ?