I'm sorry I don't have any scientific evidence but I've not heard of many people who had their BH5 randomly die on them (except on the DFI board) but I have had many people (including myself) who have had their UTT working one day and then suddenly not.

My own example I ran BH5 at 3.2 volts for months without issues.

I ran UTT for one month at 3.2 volts and one stick would not post.

Both had active cooling.