Sorry for necro (checked rules and seen none about it, personally i believe its better to revive old threads than make duplicates) but found this forum through googling OCCT blowing PSU's.
When i used the program i was searching through each tab and clicked on the PSU one, recieved the warning and thought "oh well i wont run that test then", ran a GPU stress test, it got to 98 degrees and was just about to go to 99 and then comp shut off. Looked at mobo and realised that no lights on mobo meant i had no power, thought it might be the fuse in the plug thats blown so took monitor one out, as i pushed it into PSU there was a BANG and my hand just dodged the sparks. Proper cacked it, cant remember last time my heart beated so loud and hard.
Was a 580 watt X-Power PSU, waiting to get my hands on an 1100watt anyway so not really bothered, just had no comp since thursday but borrowed my brothers old PSU in the meantime.
So yeah, im living proof that, that program can make your power supply blow if its not a very good one!