as a first time builder pick u pa good small led flashlight. there are two times that mb cpu pins can be bent. one is when the motherboard vendor put on the black cpu pin cover. if it goes on wrong or the motherboard is shipped badly when you pull that cover off to check for pins you may find some or a lot. the next place is user error. on older intel cpu you could put them in wrong. today there better keyed. most times pins are bent from dropping the cpu onto the mb. using led flashlight before you install the cpu look for any bent pins from shipping. if you find some take a photo of the damage and rma the mb back.