I have connected:

2 GPUs with risers plus power. Risers go to slot pcie2 and another black one. Power goes from power unit to the risers,and from power unit to the GPUs.

I have connected SSD, SSD to motherboard and power from power unit to add

I have connected CPU,with its fan connected to motherboard.

I have added keyboard mouse and a DVI connector for screen.

Also ram connected and nothing else. What am I missing or doing wrong? I haven't connected the 4 pin extra power connectors cause I read no need under 3 GPUs,was planning on connecting after being able to run it properly. Not sure what is missing here