Hi Volk84, thank you for joining our forum. How many cables were included with your PSU? 
The fixed wire loom of the PSU enables one 1 GPU to be connected. 

Additionally, 4x PCI express 6+2 pin cables are included to enable a triple GPU setup, as well as 3x Sata connectors (fixed loom) and 6x Sata cables for hard drives, see picture below: