You may be happy you have an Intel processor because it can handle very high temperatures (though it is not recommended to reach those high temperatures..).
Get a new certified PSU and RMA this one. Q-Shield should not short your PSU or let you reach the high temperatures. If it did, your power would be switched of automatically because of the ground electricity. It looks like your PSU has a fault.
Which temperatures do you reach with the PSU from your friend?