I am upgrading an old Dell Inspiron. While upgrading the motherboard I learned that case standoffs have to do with preventing shorting the motherboard (friend fried pcie slot yesterday, I'm taking that as a warning). The OEM motherboard is being replaced but inside the case there raised metal parts to screw into (not really standoffs, but the old board functioned). 5/6 of these line up with the new mobo. Is that potentially damaging? Bonus question: is it safe to attempt first boot without thermal paste then apply afterwards?