Never thought about problem with heat though might be interesting to look into. I did installed a riser cable yesterday because it would be a much easier access to the cmos battery in case there's any problem
New guy here.
Had the same problem with you guys 2 weeks after I received my newly built PC. After hours of diagnose, tried swapping out the cmos battery to a new(about 3 years old) energizer one and works like a charm.
So fast forward to 3 weeks later which is today, woke up in the morning and...