@Denny,, thanks for reply i was a little too unspecific, i used the EPS cable (plug) comming from the motherboard and plugged it into the PCIE jack in the PSU ( did this because i was too lazy to kneel down ).
The result was a immediate fuse blow of the house wiring.
Next I removed the EPS cable from the psu and plugged it into the right psu slot but damge was done...
I disasembled the powersupply and found the thermistor broken.... and i thing one more diode it damge , too because it has no resistance anymore..