They would be if I could use them I suppose..... All you can do sometimes is just laugh.
Ok, I just re-read the last couple of posts and saw your issue. I'm sorry about that, sucks when you build a monster rig and this happen....
If the PSU is clicking then shutting down, this means you maybe have a short somewhere in your PC, maybe fans, pumps, anything related to power.
I also have a Lepa G1600 and understand the behavior you are experiencing. Just recently, my PC was running fine one day and the next day when I tried to turn it on, it was clicking just like yours, fan spinning for half a second than everything was shutting down. I then took out my trusty EVGA Supernova G2 1000w and tried to troubleshoot but same issue was happenning. It turned out to be one of the controller on my fan controller that burned.
At the end, after burning the fault so many often by jumping the PSU, the controller no longer control the fans and always run them full speed. The potentiometer melted and I had to use another knob. (Lamptron FC-8 fan controller by the way, always had good results with lamptron)
In your case, I don't know where your issue is but maybe you should try your fans one by one or any wiring in your PC.
(Just trying to throw some suggestions, I might be wrong)