Fine for 3-4 day, but nobody was using the PC it was just running in idle. During that time no BSOD occurred. Now one week on new/used MB it's still there! There is nothing else that could be wrong, HDD is good, GPU good, RAM good (tested in another system). The last thing was overheating but as it happens on normal usage (idle, browsing...) and not on load gaming, movies... it's not the problem. Or vcore to low but it run fine on the same 1,28v for 4 years!